Stroke  —n. 1 act of striking; blow, hit. 2 sudden disabling attack caused esp. By thrombosis; apoplexy. 3 a action or movement, esp. As one of a series. B slightest action (stroke of work). 4 single complete motion of a wing, oar, etc. 5 (in rowing) the mode or action of moving the oar (row a fast stroke). 6 whole motion of a piston in either direction. 7 specified mode of swimming. 8 specially successful or skilful effort (a stroke of diplomacy).