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instructive

[in-struhk-tiv] /ɪnˈstrʌk tɪv/
adjective
1.
serving to instruct or inform; conveying instruction, knowledge, or information; enlightening.
2.
Grammar. noting a case, as in Finnish, whose distinctive function is to indicate means by which.
Origin
1605-1615
1605-15; instruct + -ive
Related forms
instructively, adverb
instructiveness, noun
noninstructive, adjective
noninstructively, adverb
noninstructiveness, noun
overinstructive, adjective
overinstructively, adverb
overinstructiveness, noun
uninstructive, adjective
uninstructively, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un instructive

instructive

/ɪnˈstrʌktɪv/
adjective
1.
serving to instruct or enlighten; conveying information
Derived Forms
instructively, adverb
instructiveness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for un instructive

instructive

adj.

1610s, from instruct + -ive. Related: Instructively; instructiveness.

Online Etymology Dictionary, © 2010 Douglas Harper
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