ETYM AS. blaest a puff of wind, a blowing; akin to Icel. blâstr, Old High Germ. blâst, and from a verb akin to Icel. blâsa to blow, Old High Germ. blâsan, Goth. blęsan. Related to Blow to eject air.
1. (Baseball) A long and hard-hit fly ball.
2. An explosion (as of dynamite).

ETYM From Bump to strike, to thump.
1. A lump on the body caused by a blow.
2. An impact (as from a collision); SYN. blow.

A strong current of air; SYN. blast, blow.