instrument.html - v.tr.
1 (often foll. by in) teach (a person) a subject etc. (instructed her in French).
2 (usu. foll. by to + infin.) direct; command (instructed him to fill in the hole).
3 (often foll. by of, or that etc. + clause) inform (a person) of a fact etc.
4 Brit. a (of a client or solicitor) give information to (a solicitor or counsel). b authorize (a solicitor or counsel) to act for one. [ME f. L instruere instruct- build, teach (as IN-(2), struere pile up)]

instrument.html - n.
1 (often in pl.) a direction; an order (gave him his instructions).
2 teaching; education (took a course of instruction).
3 Law (in pl.) directions to a solicitor or counsel.
4 Computing a direction in a computer program defining and effecting an operation.

instructional adj. [ME f. OF f. LL instructio -onis (as INSTRUCT)]

instrument.html - adj.
tending to instruct; conveying a lesson; enlightening (found the experience instructive).

instructively adv. instructiveness n.

instrument.html - n.
(fem. instructress)
1 a person who instructs; a teacher, demonstrator, etc.
2 US a university teacher ranking below professor.

instructorship n.

instrument.html - n. & v.
--n.

1 a tool or implement, esp. for delicate or scientific work.
2 (in full musical instrument) a device for producing musical sounds by vibration, wind, percussion, etc.
3 a a thing used in performing an action (the meeting was an instrument in his success). b a person made use of (is merely their instrument).
4 a measuring-device, esp. in an aeroplane, serving to determine its position in darkness etc.
5 a formal, esp. legal, document.

--v.

tr.
1 arrange (music) for instruments.
2 equip with instruments (for measuring, recording, controlling, etc.).

instrument board (or panel) a surface, esp. in a car or aeroplane, containing the dials etc. of measuring-devices. [ME f. OF instrument or L instrumentum (as INSTRUCT)]

instrument.html - adj. & n.
--adj.

1 (usu. foll. by to, in, or in + verbal noun) serving as an instrument or means (was instrumental in finding the money).
2 (of music) performed on instruments, without singing (cf. VOCAL).
3 of, or arising from, an instrument (instrumental error).
4 Gram. of or in the instrumental.

--n.

1 a piece of music performed by instruments, not by the voice.
2 Gram. the case of nouns and pronouns (and words in grammatical agreement with them) indicating a means or instrument.

instrumentalist n. instrumentality n. instrumentally adv. [ME f. F f. med.L instrumentalis (as INSTRUMENT)]