Third-person singular simple present indicative form of BLAST

(cytology) A cell that produces something, such as a fibroblast or osteoblast. / An undifferentiated or immature cell.

(firearms) A flash of light, heat and smoke at the muzzle of a firearm, caused by escaping gases when a projectile is released.

preheated air blown into a blast furnace

(metallurgy) forge in which ore is smelted to metal, the process being intensified by a blast of hot air. / (metallurgy) as above, but specifically a forge where the fuel and the ore are intermixed.

plural of blast furnace

(idiomatic) Maximum capacity or effort

(Britain, mildly blasphemous) Expression of anger.

(Britain, Cockney rhyming slang, racing) Last.

Rapid beats of a drum which often come at set intervals or as on/off beats.