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  1. FIRST Definition & Meaning - Merriam-Webster

    Jun 21, 2026 · The meaning of FIRST is preceding all others in time, order, or importance. How to use first in a sentence.

  2. FIRST | English meaning - Cambridge Dictionary

    FIRST definition: 1. (a person or thing) coming before all others in order, time, amount, quality, or importance: 2…. Learn more.

  3. FIRST - Improving Security Together

    FIRST is the premier organization and recognized global leader in incident response. Membership in FIRST enables incident response teams to more effectively respond to security incidents - reactive …

  4. First - definition of first by The Free Dictionary

    Define first. first synonyms, first pronunciation, first translation, English dictionary definition of first. n. 1. The ordinal number matching the number one in a series. 2. The one coming, occurring, or ranking …

  5. First - WordReference.com Dictionary of English

    first /fɜrst/ adj. being before all others with respect to time, order, rank, importance, etc.: I was the first guest to arrive. Automotive low (def. 18):[before a noun] When we put the car in first gear it stalls. …

  6. FIRST definition in American English | Collins English Dictionary

    19 senses: 1. a. coming before all others; earliest, best, or foremost b. (as noun) 2. preceding all others in numbering or.... Click for more definitions.

  7. first | meaning of first in Longman Dictionary of Contemporary English ...

    From Longman Dictionary of Contemporary English first1 /fɜːst $ fɜːrst/ S1 W1 adjective 1 in a series coming before all the other things or people in a series Ella was his first girlfriend. the first …

  8. first - Wiktionary, the free dictionary

    Jun 14, 2026 · AI-first airman first class at first at first bluff at first blush at first glance at first hand at first sight at the first at the first brunt blink first book of first entry breadth-first search cast the first stone …

  9. FIRST Definition & Meaning | Dictionary.com

    FIRST definition: being before all others with respect to time, order, rank, importance, etc., used as the ordinal number of one: the first edition; the first vice president. See examples of first used in a sentence.

  10. FIRST Synonyms: 170 Similar and Opposite Words - Merriam-Webster

    3 days ago · Synonyms for FIRST: initial, inaugural, original, foremost, earliest, maiden, previous, early; Antonyms of FIRST: last, final, latter, latest, ultimate, terminal ...