verb

1. To prepare a mechanism for its main work.

   “You'll have to press this button twice to prime the fuel pump.”

2. To apply a coat of primer paint to.

   “I need to prime these handrails before we can apply the finish coat.”

3. To be renewed.

Synonyms: ground, undercoat

noun

1. The implicit memory effect in which exposure to a stimulus influences response to a subsequent stimulus.

2. A substance used as a primer.

3. The powder or other combustible used to communicate fire to a charge of gunpowder, as in a firearm.