- governed by conscience; controlled by or done according to one's inner sense of what is right; principled: She's a conscientious judge, who does not let personal prejudices influence her decisions.
- careful and painstaking; particular; meticulous; scrupulous: conscientious application to the work at hand.
Origin of conscientious
SynonymsSee more synonyms on Thesaurus.com
Examples from the Web for conscientious
Her preparation sounds like normal due diligence by a conscientious executive for the task in hand.Murdoch on the Rocks: How a Lone Reporter Revealed the Mogul's Tabloid Terror Machine
August 25, 2014
Early on, we had been conscientious about providing them with gender-neutral toys like blocks, balls, and puzzles.Why I Finally Let My Girls Be Girly
May 17, 2014
Thus spoke countless, earlier generations of failed, though no doubt principled and conscientious, revolutionaries.Ukraine’s Vigilante Peacemakers
May 17, 2014
Ron, who was only 27 at the time, had been a conscientious objector.Remembering Ron Moreau: Goodbye To A War Reporting Legend
May 15, 2014
And as far as the Vietnam War goes, I read that you were a conscientious objector.Harrison Ford Discusses ‘Ender’s Game,’ Drone Warfare, Vietnam, and Playing A Badass President
October 28, 2013
By common consent he was pre-eminently God-fearing, orderly and conscientious.
In all this he has been upright, disinterested and conscientious in word and deed.
For he was conscientious and must open shop with a fresh supply each day.Pee-wee Harris
Percy Keese Fitzhugh
He was a most conscientious man, and whatever he undertook to do, he did thoroughly.Self-Help
His landscapes were conscientious and excellent in intent, but his real passion was music.A Zola Dictionary
J. G. Patterson
- involving or taking great care; painstaking; diligent
- governed by or done according to conscience
Word Origin and History for conscientious
1610s, from Middle French conscientieux (16c.; Modern French consciencieux), from Medieval Latin conscientiosus, from conscientia (see conscience). Related: Conscientiously; conscientiousness.