n.
Function: noun
Etymology: Middle English (northern dialect) blaw; probably akin to Old High German bliuwan to beat
Date: 15th century
1 : a forcible stroke delivered with a part of the body or with an instrument
2 : a hostile act or state : COMBAT <come to blow s >
3 : a forcible or sudden act or effort : ASSAULT
4 : an unfortunate or calamitous happening <failure to land the job came as a blow >