1. n.1 a mixture used by painters for a preparatory coat.
2 a preparation of sugar added to beer.
3 a gunpowder placed in the pan of a firearm. b a train of powder connecting the fuse with the charge in blasting etc.2. n. an acceleration of the tides taking place from the neap to the spring tides.
Etymology: prime (v.) f. PRIME(1) + -ING(1)