the act or practice of instructing or teaching; education.
knowledge or information imparted.
an item of such knowledge or information.
Usually, instructions. orders or directions: The instructions are on the back of the box.
the act of furnishing with authoritative directions.
Computers. a command given to a computer to carry out a particular operation.

1375–1425; late Middle English instruccio(u)n < Latin instructiōn- (stem of instructiō). See instruct, -ion

instructional, adjective
misinstruction, noun
noninstructional, adjective
noninstructionally, adverb
overinstruction, noun
preinstruction, noun
reinstruction, noun
self-instruction, noun

1. tutoring, coaching; training, drill, exercise; indoctrination; schooling. 5. command, mandate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
instruction (ɪnˈstrʌkʃən)
1.  a direction; order
2.  the process or act of imparting knowledge; teaching; education
3.  computing a part of a program consisting of a coded command to the computer to perform a specified function

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

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).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Computing Dictionary

instruction definition

machine instruction

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Example sentences
In the current political discourse, civic education means more than instruction
  about the functions of government.
Online education will be part of the future, but on-site instruction brings
  benefits beyond the obvious.
Yes, online instruction can enhance traditional education, but teaching methods
  need to be adapted.
Consumer-electronics instruction manuals need a makeover.
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