Prime

being at the best stage of development

first in rank or degree

of superior grade

used of the first or originating agent

of or relating to or being an integer that cannot be factored into other integers

the time of maturity when power and vigor are greatest

the period of greatest prosperity or productivity

a natural number that has exactly two distinct natural number divisors: 1 and itself

the second canonical hour; about 6 a.m.

insert a primer into (a gun, mine, or charge) preparatory to detonation or firing

fill with priming liquid

cover with a primer; apply a primer to