target (n.) Look up target at Dictionary.com
c.1400, "shield," diminutive of late Old English targe, from Old French targe "light shield," from Frankish *targa "shield" (cf. Old High German zarga "edging, border," German zarge, Old English targe, Old Norse targa "shield"), from Proto-Germanic *targo "border, edge." Meaning "object to be aimed at in shooting" first recorded 1757, originally in archery. Target audience is by 1951, early reference is to Cold War psychological warfare.
target (v.) Look up target at Dictionary.com
"to use as a target," 1837, from target (n.). Related: Targeted; targeting.