Real Dictionary

stroke
A swimming stroke is a particular style or method of swimming.
If someone has a stroke, a blood vessel in their brain bursts or becomes blocked, which may kill them or make them unable to move one side of their body.
The strokes of a pen or brush are the movements or marks that you make with it when you are writing or painting.
When you are swimming or rowing, your strokes are the repeated movements that you make with your arms or the oars.
verb: If you stroke someone or something, you move your hand slowly and gently over them.

stroke in American English
a striking of one thing against another; blow or impact of an ax, whip, etc.

stroke in American English 1
noun: the act or an instance of striking, as with the fist, a weapon, or a hammer; a blow
transitive verb: to mark with a stroke or strokes, as of a pen; cancel, as by a stroke of a pen

stroke in American English 2
noun: an act or instance of stroking; a stroking movement
transitive verb: to pass the hand or an instrument over (something or somebody) lightly or with little pressure; rub gently, as in soothing or caressing

stroke in Automotive Engineering
noun: A stroke is one complete back-and-forth movement of a piston in its cylinder bore.