Online Dictionaries

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Bio-dictionary

The Bio-Dictionary helps you to understand common terms in biology. Definitions come in the form of a figure with accompanying text, a short video  , or both.  learn more

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Britannica Dictionary

Part of the Britannica products but also includes "Word of the Day", quizzes, and core vocabulary.  learn more

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Britannica Kids Dictionary

OUR MISSION IS TO PROVIDE A SAFE ENVIRONMENT WITH TRUSTED CONTENT THAT FOSTERS LEARNING AND GROWTH FOR YOUR WHOLE FAMILY. Britannica has designed a safe and trusted site that allows kids to be just that — kids. Our safe and age-appropriate content keeps them focused on what you want them seeing online while enabling them…  learn more

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Cambridge Dictionary

Cambridge University Press has been publishing dictionaries for learners of English since 1995. Cambridge Dictionaries Online began offering these dictionaries completely free of charge in 1999 — and today, Cambridge Dictionary is still growing. Cambridge English publishes materials for learners and teachers of English and has English learning solutions for teachers, students, and schools.  learn more

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Collins Online Dictionary

Collins is a major publisher of Educational, Language and Geographic content. Collins online dictionary and reference resources draw on the wealth of reliable and authoritative information about language.  learn more

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Computer Terms Glossary

Computer hope has compiled 12,000 computer and technical terms and definitions, broken out by areas like Cell Phones and Gaming. Learn the different between WiFi and Widget or Bits, Bytes and Bricked.  learn more

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Fact Monster Dictionary

From the solar system to the world economy to educational games, Fact Monster has the info kids are seeking. Our site is COPPA and kidSAFE-certified, so you can rest assured it's a safe place for kids to grow and explore.  learn more

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Glossary of Education Reform

Created by the Great Schools Partnership, the Glossary of Education Reform is a comprehensive online resource that describes widely used school-improvement terms, concepts, and strategies for journalists, parents, and community members.  learn more

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Glossary of Shakespeare's Words

Understanding 16th century English can be a challenge for students. This site lists thousands of words, from abjure to wot, provides their definition, and shows where each word can be found within the works of William Shakespeare.  learn more

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Kid Thesaurus

Kid Thesaurus is a kid-friendly thesaurus that allows students to find synonyms easily. If you’ve used another online thesaurus then you have realized how difficult they can be for students. Our mission at KidThesaurus.com is to provide students with an easy-to-use resource to find synonyms.  learn more

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Kids Dictionary Search

Kid's Search is about creating a fun and safe search platform and website. Our target audience is k-12 for use in the classroom, libraries and home. The site can be used as an interactive site and web portal. All of our out bound links are screened using various technologies and community feedback.  learn more

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Lexipedia

Lexipedia is an online visual semantic network with a dictionary and thesaurus. Lexipedia presents words with their semantic relationships displayed in an animated visual word web.  learn more

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Macmillan Dictionary

Find meanings, pronunciations, synonyms, collocations, idioms as well as images, videos and sound effects. Browse BuzzWords and the crowdsourced Open Dictionary. Improve your English with games, quizzes and helpful resources for teachers and students.  learn more

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Math Dictionary for Kids

A Maths Dictionary for Kids is an online math dictionary for students which explains over 955 common mathematical terms and math words in simple language with definitions, detailed visual examples, and online practice links for some entries.  learn more

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Mathwords

Mathwords: Terms and Formulas from Beginning Algebra to Calculus An interactive math dictionary with enough math words, math terms, math formulas, pictures, diagrams, tables, and examples to satisfy your inner math geek.  learn more

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Merriam-Webster

For more than 180 years, Merriam-Webster has been America's leading provider of language information. Each month, our award-winning websites, apps, and social media channels offer guidance to tens of millions of visitors. In print, our publications include Merriam-Webster's Collegiate Dictionary (among the best-selling books in American history) and dictionaries for English-language learners.    learn more

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Space Terms Glossary A-Z

If you ever wonder the meaning of an astronomical word, check out this site to find the definition of the space term, from Absolute Magnitude to Zodiacal Light (no, it's not what you think).  learn more

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The Dictionary.com

Dictionary.com strives to enable and inspire connection, communication, learning, creativity, and expression in a world powered by words. Language is constantly evolving, and the editorial offerings from Dictionary.com shine a light on how language is being used. From pop culture to idioms and grammar advice, there’s always something new to learn from Dictionary.com.  learn more

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The Free Dictionary

The Free Dictionary combines a dictionary, thesaurus, medical dictionary, legal dictionary, financial dictionary, acronyms, idioms, and an encyclopedia into a single online reference. Check out the hangman's game and spelling bee on their home page. Highly recommended.  learn more

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Thinkmap Visual Thesaurus

The Visual Thesaurus is an ideal teaching resource for children of all ages, with a visually captivating display that engages students in learning new words and concepts. To find out more about how you can integrate the Visual Thesaurus in your classroom, click here. Visual Thesaurus for Education Enrich literacy through inquiry The Visual Thesaurus…  learn more

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Vocabulary.com

Our mission is to close the word gap so that students can achieve at higher levels. When learners are equipped with the building blocks of language, they have greater access to education, information, and opportunities. At Vocabulary.com, we're passionate about growing strong readers, writers, and thinkers. That's what drives us to create innovative tools and…  learn more

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WILD Wordsmyth

WILD facilitates teaching foundational digital-literacy skills for K-2 students while capturing their interest and imagination. It is built for educators to teach these skills both through modeling and student-centered exploraron. And, unique to WILD, an introductory, student-focused lesson on Being a Good Digital Citizen has been included!  Wordsmyth's Illustrated Learner's Dictionary   learn more

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WILD Wordsmyth: Picture Dictionary

The Wordsmyth Illustrated Learner’s Dictionary (WILD) is Wordsmyth’s most exciting, colorful, and interactive dictionary. WILD is geared toward children in Grades K to 2 as well as to young English Language Learners. At the core of WILD is an abundantly illustrated dictionary that contains child-friendly, full-sentence definitions and example sentences for approximately 4,000 words.  learn more

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Word Hippo

Thesaurus and word tools for your creative needs. WordHippo was first launched in 2008 to provide users with a simple website for looking up similar and opposite words. Since then, we have expanded our range of available tools to include: Rhyming words Example sentences Translations Definitions Word forms Word game helpers Cite Us Kat IP…  learn more

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WordHippo: Thesaurus and Word Tools

Thesaurus and word tools for your creative needs WordHippo is an online website and application providing a range of tools related to the use of words for creative and recreational purposes such as writing, poetry, translations, word games, etc. Cite Us Kat IP Pty Ltd 2008. Word Hippo. Retrieved from https://www.wordhippo.com/  learn more

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Wordnik

Wordnik is the world's biggest online English dictionary, by number of words. Wordnik shows definitions from multiple sources, so you can see as many different takes on a word's meaning as possible.  learn more

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Wordsmyth Word Explorer Children's Dictionary

For kid-friendly definitions and example sentences for older children, try Wordsmyth's Word Explorer Children's Dictionary, containing over 14,000 entries, each with human-voiced audio pronunciations. The dictionary also includes synonyms and antonyms, word histories, geographical entries with maps, and abundant illustrations.  learn more

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yourDictionary

YourDictionary is more than a standard on-line dictionary. It provides lots of tools and resources to help students choose their words precisely, avoid usage pitfalls, and gain confidence in their use of grammar. In addition to word definitions, you will find pronunciation help, parts of speech, sentence examples and quotations.  learn more