Noun

1. A number that has no factor but itself and 1
2. The period of greatest prosperity or productivity
3. The second canonical hour; about 6 a.m.
4. The time of maturity when power and vigor are greatest

Adjective

1. Of or relating to or being an integer that cannot be factored into other integers

Verb

1. Insert a primer into (a gun, mine, or charge) preparatory to detonation or firing
2. Cover with a primer; apply a primer to
3. Fill with priming liquid