1412, from O.Fr. instruction, from L. instructionem (nom. instructio) "building, arrangement, teaching," from instructus, pp. of instruere "arrange, inform, teach," from in- "on" + struere "to pile, build" (see structure).
instruction (ĭn-strŭk'shən) Pronunciation Key
A sequence of bits that tells a computer's central processing unit to perform a particular operation. An instruction can also contain data to be used in the operation.