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[kon-shee-en-shuh s, kon-see-] /ˌkɒn ʃiˈɛn ʃəs, ˌkɒn si-/
controlled by or done according to one's inner sense of what is right; governed by conscience; principled:
a conscientious judge.
careful and painstaking; particular; meticulous; scrupulous:
conscientious application to the work at hand.
1605-15; < Medieval Latin conscientiōsus, equivalent to Latin conscienti(a) conscience + -ōsus -ous
Related forms
conscientiously, adverb
conscientiousness, noun
hyperconscientious, adjective
hyperconscientiously, adverb
hyperconscientiousness, noun
nonconscientious, adjective
nonconscientiously, adverb
nonconscientiousness, noun
overconscientious, adjective
overconscientiously, adverb
overconscientiousness, noun
quasi-conscientious, adjective
quasi-conscientiously, adverb
unconscientious, adjective
unconscientiously, adverb
unconscientiousness, noun
1. just, upright, honest, faithful, devoted, dedicated. 2. See painstaking. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for conscientiously
  • They guard it so conscientiously that they have even given it a code name.
  • Professionalism implies doing your job conscientiously.
  • Then they tried to do both tasks simultaneously and equally conscientiously.
  • The costumes are sparse, the weapons cardboard and the sound track conscientiously unsynchronized.
  • The movie is, if anything, too conscientiously encyclopedic.
  • But if you conscientiously use the freezer in two ways, you'll value it as never before.
  • In the beginning they all did their jobs quite conscientiously and politely.
  • If you conscientiously wear these devices, they work.
  • But he conscientiously sent his family to the seashore in the summer.
  • The great pianist conscientiously applied the prescription to himself, and everything he did was con brio.
British Dictionary definitions for conscientiously


involving or taking great care; painstaking; diligent
governed by or done according to conscience
Derived Forms
conscientiously, adverb
conscientiousness, 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 conscientiously



1610s, from Middle French conscientieux (16c.; Modern French consciencieux), from Medieval Latin conscientiosus, from conscientia (see conscience). Related: Conscientiously; conscientiousness.

Online Etymology Dictionary, © 2010 Douglas Harper
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