1. being at the best stage of development

    Synonyms : meridian
    Examples :
    • our manhood's prime vigor
  2. the time of maturity when power and vigor are greatest

    Synonyms : prime of life
    Type Of : adulthood, maturity
  3. cover with a primer; apply a primer to

    Synonyms : ground, undercoat
    Type Of : paint
  4. the period of greatest prosperity or productivity

    Synonyms : bloom, blossom, efflorescence, flower, flush, heyday, peak
    Type Of : period, period of time, time period
  5. a natural number that has exactly two distinct natural number divisors: 1 and itself

    Synonyms : prime quantity
    Type Of : number
  6. first in rank or degree

    Synonyms : premier
    Examples :
    • the prime minister
  7. of superior grade

    Synonyms : choice, prize, quality, select
    Examples :
    • prime beef
  8. fill with priming liquid

    Type Of : make full, fill, fill up
    Examples :
    • prime a car engine
  9. insert a primer into (a gun, mine, or charge) preparatory to detonation or firing

    Type Of : set, ready, prepare, gear up, set up, fix
    Examples :
    • prime a cannon
    • prime a mine
  10. of or relating to or being an integer that cannot be factored into other integers

    Examples :
    • prime number
  11. the second canonical hour; about 6 a.m.

    Type Of : canonical hour
  12. used of the first or originating agent

    Examples :
    • prime mover