Merriam-Webster
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Merriam-Webster provides definitions, pronunciations, examples, word histories, synonyms, antonyms, and related words for publicly listed entries, plus Word of the Day entries for today or published archive dates.
Your information
The word or phrase to look up, for example serendipity.
Example results
- Word
- serendipity
- Pronunciation
- ˌser-ən-ˈdi-pə-tē
- Merriam Webster Link
- merriam-webster.com
- Pronunciation Audio Link
- media.merriam-webster.com
- Entries
Entries Etymology Definitions Part of Speech First Known Use Example Sentences Serendip, variant of Sarandīb, Persian and Arabic name for Sri Lanka + -ity; from its possession by the heroes of the Persian fairy tale The Three Princes of Serendip1. the ability to find valuable or agreeable things not sought for, 1. also: luck that takes the form of such findingnoun1754… materials researchers, who now rely mostly on rules of thumb, trial-and-error and serendipity for developing new materials., As they leapfrog from South Africa to Singapore in search of local delicacies, the authors prove again and again that serendipity is the traveler's strongest ally: many of their most memorable meals issue from the hands of generous strangers …, … the pleasure of wandering while lost and discovering by serendipity interesting new places., … [Sh'Kia] Augustin landed the role through the charmed stroke of serendipity and destiny., For most of his life, he has been blessed with good fortune, tinged with a bit of serendipity.
About Merriam-Webster
Merriam-Webster (MW) Define word returns pronunciation, definitions, examples, and word history for a word or phrase you provide.
Get synonyms returns meanings, synonyms, antonyms, and related words for a word you provide.
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Define word
1 credit per runLook up a word or phrase in Merriam-Webster’s dictionary and return pronunciation, meanings, examples, and word history. Only publicly listed dictionary entries are included.
What you provide
| Field | Type | Required | Description |
|---|---|---|---|
Wordword | Text | Required | The word or phrase to look up, for example serendipity.Example: Run |
What you get
| Field | Type | Description |
|---|---|---|
Wordword | Text | Dictionary headword.Example: Serendipity |
Entriesentries | List | Dictionary entries in page order. |
Etymologyentries[].etymology | Text | Example: Serendip, variant of Sarandīb, Persian and Arabic name for Sri Lanka + -ity… |
Definitionsentries[].definitions | List | Numbered definitions in displayed order. |
Part of Speechentries[].part_of_speech | Text | Example: Noun |
First Known Useentries[].first_known_use | Text | Example: 1754 |
Example Sentencesentries[].example_sentences | List | |
Pronunciationpronunciation | Text | Pronunciation shown for the headword.Example: ˌser-ən-ˈdi-pə-tē |
Merriam Webster Linkmerriam_webster_link | Text | Page for this dictionary word.Example: https://www.merriam-webster.com/dictionary/serendipity |
Pronunciation Audio Linkpronunciation_audio_link | Text | Link to the pronunciation audio when available.Example: https://media.merriam-webster.com/audio/prons/en/us/mp3/s/serend02.mp3 |
Example result
For Word: Serendipity
{
"word": "serendipity",
"entries": [
{
"etymology": "Serendip, variant of Sarandīb, Persian and Arabic name for Sri Lanka + -ity; from its possession by the heroes of the Persian fairy tale The Three Princes of Serendip",
"definitions": [
"1. the ability to find valuable or agreeable things not sought for",
"1. also: luck that takes the form of such finding"
],
"part_of_speech": "noun",
"first_known_use": "1754",
"example_sentences": [
"… materials researchers, who now rely mostly on rules of thumb, trial-and-error and serendipity for developing new materials.",
"As they leapfrog from South Africa to Singapore in search of local delicacies, the authors prove again and again that serendipity is the traveler's strongest ally: many of their most memorable meals i…",
"… the pleasure of wandering while lost and discovering by serendipity interesting new places."
]
}
],
"pronunciation": "ˌser-ən-ˈdi-pə-tē",
"merriam_webster_link": "https://www.merriam-webster.com/dictionary/serendipity",
"pronunciation_audio_link": "https://media.merriam-webster.com/audio/prons/en/us/mp3/s/serend02.mp3"
}Get synonyms
1 credit per runGet a word’s thesaurus meanings, examples, synonyms, antonyms, and related words from its public Merriam-Webster page.
What you provide
| Field | Type | Required | Description |
|---|---|---|---|
Wordword | Text | Required | A word to look up in the thesaurus, for example happy.Example: Happy |
What you get
| Field | Type | Description |
|---|---|---|
Wordword | Text | The word shown on the thesaurus page.Example: Happy |
Meaningsmeanings | List | Meanings in the order they appear on the page. Similar words appear under synonyms; related words are included only when shown separately. |
Meaningmeanings[].meaning | Text | Example: experiencing pleasure, satisfaction, or delight |
Antonymsmeanings[].antonyms | List | |
Synonymsmeanings[].synonyms | List | |
Page Linkmeanings[].page_link | Text | Example: https://www.merriam-webster.com/thesaurus/happy#thesaurus-entry-1-1 |
Related Wordsmeanings[].related_words | List | |
Part of Speechmeanings[].part_of_speech | Text | Example: Adjective |
Example Sentencemeanings[].example_sentence | Text | Example: made bread for the first time and was happy with the tasty result |
Thesaurus Linkthesaurus_link | Text | Link to the word’s thesaurus page.Example: https://www.merriam-webster.com/thesaurus/happy |
Example result
For Word: Happy
{
"word": "happy",
"meanings": [
{
"meaning": "experiencing pleasure, satisfaction, or delight",
"antonyms": [
"unhappy",
"sad",
"dissatisfied"
],
"synonyms": [
"delighted",
"pleased",
"glad"
],
"page_link": "https://www.merriam-webster.com/thesaurus/happy#thesaurus-entry-1-1",
"related_words": [],
"part_of_speech": "adjective",
"example_sentence": "made bread for the first time and was happy with the tasty result"
},
{
"meaning": "coming or happening by good luck especially unexpectedly",
"antonyms": [
"unhappy",
"unfortunate",
"unlucky"
],
"synonyms": [
"lucky",
"fortunate",
"convenient"
],
"page_link": "https://www.merriam-webster.com/thesaurus/happy#thesaurus-entry-1-2",
"related_words": [],
"part_of_speech": "adjective",
"example_sentence": "a happy discovery, finding the letter that would prove her innocence"
},
{
"meaning": "feeling that one's needs or desires have been met",
"antonyms": [
"unhappy",
"dissatisfied",
"displeased"
],
"synonyms": [
"satisfied",
"pleased",
"contented"
],
"page_link": "https://www.merriam-webster.com/thesaurus/happy#thesaurus-entry-1-3",
"related_words": [],
"part_of_speech": "adjective",
"example_sentence": "has been much happier ever since she moved"
}
],
"thesaurus_link": "https://www.merriam-webster.com/thesaurus/happy"
}Get word of the day
1 credit per runGet Merriam-Webster’s Word of the Day for today or a past archive date, with its meaning, example, pronunciation, and background note. Dates without a published entry are unavailable.
What you provide
| Field | Type | Required | Description |
|---|---|---|---|
Datedate | Date | Optional | Day to look up (YYYY-MM-DD), such as 2025-02-15. Omit for today.Example: 2025-02-15 |
What you get
| Field | Type | Description |
|---|---|---|
Datedate | Date | Publication date.Example: 2026-09-28 |
Linklink | Text | Word of the Day page link.Example: https://www.merriam-webster.com/word-of-the-day/fungible-2026-09-28 |
Wordword | Text | Word of the Day.Example: Fungible |
Definitiondefinition | Text | Meaning in plain text.Example: Fungible describes things, such as currency, goods, and commodities, that can… |
Did You Knowdid_you_know | Text | Did You Know? note in plain text. |
Pronunciationpronunciation | Text | Pronunciation shown on the page.Example: FUN-juh-bul |
Part of Speechpart_of_speech | Text | Part of speech shown on the page.Example: Adjective |
Example Sentenceexample_sentence | Text | Usage example in plain text.Example: A dollar bill is considered fungible because it can easily and acceptably be… |
Example result
For
{
"date": "2026-09-28",
"link": "https://www.merriam-webster.com/word-of-the-day/fungible-2026-09-28",
"word": "fungible",
"definition": "Fungible describes things, such as currency, goods, and commodities, that can be exchanged for something else of the same kind or value. In broader usage, fungible can also mean “interchangeable,” as …",
"did_you_know": "Before expectations about the origins of fungible mushroom into mycological fantasy: no, fungible has no relation to the noun fungus and its plural fungi. The fungi in fungible is there because of the…",
"pronunciation": "FUN-juh-bul",
"part_of_speech": "adjective",
"example_sentence": "A dollar bill is considered fungible because it can easily and acceptably be traded for ten dimes, four quarters, twenty nickels, or one hundred pennies, as well as any other dollar bill."
}For developers
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"visibility": "public",
"operation": "define_word",
"version": 1,
"input": {
"word": "run"
},
"response": {
"format": "json"
}
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