back•stroke (bak´) n.
1 a stroke backward, or a backhanded stroke
2 Swimming
a) a stroke made by lying face upward; esp., a racing stroke in which the arms are stretched alternately over the head and the legs are moved in a flutter kick
b) a contest in which each participant uses such a stroke
–vi.
–stroked',
–strok'ing, to perform a backstroke
–vt. to hit with a backstroke