con·​sci·​en·​tious | \ˌkän(t)-shē-ˈen(t)-shəs \

Definition of conscientious 

1 : meticulous, careful a conscientious listener

2 : governed by or conforming to the dictates of conscience : scrupulous a conscientious public servant

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Other Words from conscientious

conscientiously adverb
conscientiousness noun

Synonyms & Antonyms for conscientious


careful, fussy, loving, meticulous, painstaking, scrupulous



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Choose the Right Synonym for conscientious

upright, honest, just, conscientious, scrupulous, honorable mean having or showing a strict regard for what is morally right. upright implies a strict adherence to moral principles. a stern and upright minister honest stresses adherence to such virtues as truthfulness, candor, or fairness. known for being honest in business dealings just stresses conscious choice and regular practice of what is right or equitable. workers given just compensation conscientious and scrupulous imply an active moral sense governing all one's actions and painstaking efforts to follow one's conscience. conscientious in the completion of her assignments scrupulous in carrying out the terms of the will honorable suggests a firm holding to codes of right behavior and the guidance of a high sense of honor and duty. a difficult but honorable decision

Did You Know?

According to American writer and editor H.L. Mencken, "Conscience is the inner voice which warns us someone may be looking." A person who is conscientious makes sure that if others are watching, they like what they see. "Conscience" and "conscientious" both come from the Latin verb conscire, a word that means "to be conscious" or "to be conscious of guilt" and that traces back to a still older Latin word, scire, meaning "to know."

Examples of conscientious in a Sentence

He was a good friend to his comrades, a conscientious leader mindful of his men's needs; an upright family man with strong, bright, proud children … — Tom Clancy, Without Remorse, 1994 Because Puckett was a conscientious lieutenant … his men did not have to stint on their fire. He had made sure that every man was carrying a basic load of ammunition and then some to spare … — Neil Sheehan, A Bright Shining Lie, 1988 He was shifty about money matters, not conscientious about returning advances, fulfilling contracts, reading manuscripts. — Monroe K. Spears, American Ambitions, 1987 She has always been a very conscientious worker. He was conscientious about following the doctor's orders.
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Recent Examples on the Web

State officials are worried the staggering numbers may rise if people aren't conscientious of water safety, warning parents to be wary of their children near bodies of water at all times. Manoella Macedo, ajc, "Several drownings in same week raise water safety concerns," 9 July 2018 But as consumers become more conscientious about where their food comes from, a new generation of farmers is cropping up. Aubrey Nagle,, "ICE protester sues Philly police, young Pa. farmers shake up industry | Morning Newsletter," 11 July 2018 The growing world of foodies and conscientious consumers cheered them on. Robin Mcdowell, Washington Post, "Senator calls for investigation into possible fish fraud," 15 June 2018 Also, in his time with the Orioles, the club was already conscientious with his workload, often finding spots to give him extra rest in order to keep him healthy. Eduardo A. Encina,, "Former Orioles lefty Wei-Yin Chen returns to Camden Yards," 16 June 2018 The rise of these farms manned by young farmers has fallen in step with a growing number of consumers who are more conscientious about where their food is coming from. Katie Park,, "Like your organic food? Pennsylvania's young farmers are growing it," 11 July 2018 As a conscientious member of the community, the company also supports service initiatives to help contribute to making Cincinnati thrive. Jessica Levy,, "VEGA Americas promotes continuous improvement," 8 June 2018 Eighth grader Ella Angel is a conscientious student. Charlene Paparizos,, "Chagrin Falls February Students of the Month: Community Voices," 1 Jan. 2018 People who reported being conscientious—organized and detail-oriented—planned more elaborate fantasies. Elizabeth Bernstein, WSJ, "New Research Delves Into Sexual Fantasies," 25 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'conscientious.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of conscientious

1603, in the meaning defined at sense 2

History and Etymology for conscientious

see conscience

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Last Updated

7 Nov 2018

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Time Traveler for conscientious

The first known use of conscientious was in 1603

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More Definitions for conscientious



English Language Learners Definition of conscientious

: very careful about doing what you are supposed to do : concerned with doing something correctly


con·​sci·​en·​tious | \ˌkän-shē-ˈen-shəs \

Kids Definition of conscientious

1 : guided by or agreeing with a sense of doing what is right No conscientious person would stand for such unfair actions.

2 : using or done with care conscientious teachers conscientious efforts

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