constructive

[kuhn-struhk-tiv]
adjective
1.
constructing or tending to construct; helping to improve; promoting further development or advancement (opposed to destructive ): constructive criticism.
2.
of, pertaining to, or of the nature of construction; structural.
3.
deduced by inference or interpretation; inferential: constructive permission.
4.
Law. denoting an act or condition not directly expressed but inferred from other acts or conditions.

Origin:
1670–80; < Medieval Latin constrūctīvus, equivalent to Latin constrūct(us) (see construct) + īvus -ive

constructively, adverb
constructiveness, noun
nonconstructive, adjective
nonconstructively, adverb
nonconstructiveness, noun
quasi-constructive, adjective
quasi-constructively, adverb
unconstructive, adjective
unconstructively, adverb


1. productive, helpful, handy, useful.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
constructive (kənˈstrʌktɪv)
 
adj
1.  serving to build or improve; positive: constructive criticism
2.  law deduced by inference or construction; not expressed but inferred
3.  law having a deemed legal effect: constructive notice
4.  another word for structural
 
con'structively
 
adv
 
con'structiveness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

constructive
early 15c., "derived by interpretation," from M.L. constructivus, from construct- , pp. stem of construere "to heap up" (see construction). Meaning "pertaining to construction" is from 1817; "having the quality of constructing" is from 1841. Constructive criticism is attested by 1841.
Online Etymology Dictionary, © 2010 Douglas Harper
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FOLDOC
Computing Dictionary

constructive definition

mathematics
A proof that something exists is "constructive" if it provides a method for actually constructing it. Cantor's proof that the real numbers are uncountable can be thought of as a *non-constructive* proof that irrational numbers exist. (There are easy constructive proofs, too; but there are existence theorems with no known constructive proof).
Obviously, all else being equal, constructive proofs are better than non-constructive proofs. A few mathematicians actually reject *all* non-constructive arguments as invalid; this means, for instance, that the law of the excluded middle (either P or not-P must hold, whatever P is) has to go; this makes proof by contradiction invalid. See intuitionistic logic for more information on this.
Most mathematicians are perfectly happy with non-constructive proofs; however, the constructive approach is popular in theoretical computer science, both because computer scientists are less given to abstraction than mathematicians and because intuitionistic logic turns out to be the right theory for a theoretical treatment of the foundations of computer science.
(1995-04-13)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The trick is to channel those impulses in a constructive direction.
Identify student learning needs and implement constructive responses to them.
Constructive suggestions are rare in a debate that has mixed a lot of
  rhetorical cant with a big principle.
Read the paper and give some constructive feedback.
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