Instrument (?), n. [F. instrument, L. instrumentum. See Instruct.]
[1913 Webster]

1. That by means of which any work is performed, or result is effected; a tool; a utensil; an implement; a device; as, the instruments of a mechanic; astronomical instruments.
[1913 Webster]

All the lofty instruments of war. Shak.
[1913 Webster]

2. A contrivance or implement, by which musical sounds are produced; as, a musical instrument.
[1913 Webster]

Praise him with stringed instruments and organs. Ps. cl. 4.
[1913 Webster]

But signs when songs and instruments he hears. Dryden.
[1913 Webster]

3. (Law) A writing, as the means of giving formal expression to some act; a writing expressive of some act, contract, process, as a deed, contract, writ, etc. Burrill.
[1913 Webster]

4. One who, or that which, is made a means, or is caused to serve a purpose; a medium, means, or agent; as, their army was primarily an instrument of oppression.
[1913 Webster +PJC]

Or useful serving man and instrument,
To any sovereign state. Shak.
[1913 Webster]

The bold are but the instruments of the wise. Dryden.

Syn. -- Tool; implement; utensil; machine; apparatus; channel; agent.
[1913 Webster]