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

instructions (ɪnˈstrʌkʃənz)
pl n
1.  directions, orders, or recommended rules for guidance, use, etc
2.  law the facts and details relating to a case given by a client to his solicitor or by a solicitor to a barrister with directions to conduct the case: to take instructions

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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Example sentences
Feed monthly with a complete houseplant fertilizer, following label
Fertilize every other week with fish emulsion, or use a granular organic
  fertilizer according to instructions.
Beans and sunflowers were started from seed, following package instructions.
Sometimes a recipe, especially a historical one, is more than the sum of its
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