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Language·4 min read·June 9, 2026

Free Online English Dictionary: Definitions, Synonyms & Pronunciation

Look up any English word's definition, part of speech, synonyms, antonyms, and audio pronunciation for free. No account needed, powered by the Free Dictionary API.

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A good dictionary does more than define words — it explains how they're used, how they're pronounced, what they mean in different contexts, and what other words carry similar or opposite meanings. Whether you're a writer hunting for the right word, a student building vocabulary, or a non-native speaker learning English, having instant access to a comprehensive dictionary makes every reading and writing session more productive.

What the Dictionary Tool Shows You

When you look up a word, you get a full breakdown:

Phonetics — The pronunciation written in the International Phonetic Alphabet (IPA), like /lʌv/ for "love." IPA is a universal notation system that tells you exactly how to pronounce a word regardless of your native language.

Audio pronunciation — A play button to hear the word spoken aloud by a native speaker. Multiple audio clips are often available for British and American English pronunciations.

Definitions — Each meaning of the word, organised by part of speech. A single word can have multiple entries as a noun, verb, and adjective, each with different definitions.

Part of speech — Whether the word is a noun, verb, adjective, adverb, pronoun, preposition, conjunction, or interjection. This is essential for using the word grammatically correctly.

Example sentences — Short sentences showing the word used in context, which is often more useful than the definition alone.

Synonyms and antonyms — Words with similar meanings (synonyms) and opposite meanings (antonyms) are listed alongside definitions, helping you find the right word when you're close but not quite there.

How to Look Up a Word

  1. Type a word into the search box and press Enter or click Search.
  2. Browse the definitions — If the word has multiple entries (e.g., "run" as a verb vs. a noun), scroll through them.
  3. Listen to the pronunciation — Click the audio button to hear the word spoken. Try both UK and US pronunciations if both are available.
  4. Use synonyms as jumping-off points — Click any synonym to look it up and explore related words.

Who Uses an Online Dictionary?

Writers looking for precise word choices. The difference between "sad", "melancholy", "despondent", and "forlorn" is a matter of degree and connotation. A dictionary with synonyms and example sentences helps you find the word that fits exactly.

ESL learners building English vocabulary. Looking up a word you just read in context — seeing its pronunciation, definition, and example sentence — is one of the most effective vocabulary-building strategies.

Students working on essays who want to check that they're using a word correctly before submitting. It's easy to misuse words like "infer" vs. "imply" or "affect" vs. "effect."

Word game players — Scrabble, Wordle, crossword enthusiasts. Quickly checking whether a word is valid and what it means.

Proofreaders and editors verifying that a word exists, is spelled correctly, and is used appropriately.

Tips for Better Word Lookups

  • Try the root word if inflected forms fail — If "running" returns nothing useful, try "run."
  • Check the part of speech — Some words change meaning dramatically between noun and verb uses. "Light" as an adjective means something very different from "light" as a verb.
  • Read example sentences — They often reveal nuances of usage that the definition alone doesn't capture.
  • Use synonyms to diversify your writing — If you've used "important" three times in a paragraph, looking it up reveals alternatives like "significant," "critical," "essential," or "vital."

Understanding IPA Pronunciation

IPA uses consistent symbols regardless of language. A few common English ones:

  • /ʌ/ — the "u" sound in "cup" or "fun"
  • /iː/ — the long "ee" sound in "see" or "tree"
  • /ɒ/ — the short "o" sound in "lot" or "stop" (British English)
  • /θ/ — the "th" sound in "think" or "three"
  • /ð/ — the "th" sound in "the" or "this"

Frequently Asked Questions

Where does the dictionary data come from? The tool uses the Free Dictionary API, which aggregates definitions from Wiktionary and other open-licensed sources. It covers tens of thousands of English words.

Why doesn't my word return a result? Very obscure words, proper nouns (names, places), and slang terms may not be in the database. Try common alternative spellings or the base form of the word.

Can I look up phrases or idioms? Compound words and some common phrases are included, but the dictionary is primarily word-based. For idioms, try looking up the key word in the phrase.

Is the pronunciation audio free to use? The audio clips are from Wiktionary, which licenses its content under Creative Commons. Check the Wiktionary terms if you need to use audio clips in a published work.

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