Definition of priming

• p. pr. & vb. n. - of Prime
• n. - The powder or other combustible used to communicate fire to a charge of gunpowder, as in a firearm.
• n. - The first coating of color, size, or the like, laid on canvas, or on a building, or other surface.
• n. - The carrying over of water, with the steam, from the boiler, as into the cylinder.