INSTRUMENT

I. noun Etymology: Middle English, from Anglo-French, from Latin ~um, from instruere to arrange, instruct Date: 14th century a device used to produce music, 2. a means whereby something is achieved, performed, or furthered, one used by another as a means or aid ; dupe , tool , implement , a formal legal document (as a deed, bond, or agreement), 5. a measuring device for determining the present value of a quantity under observation, an electrical or mechanical device used in navigating an airplane, see: implement II. transitive verb Date: 1752 to address a legal ~ to, to score for musical performance ; orchestrate , to equip with ~s especially for measuring and recording data