The meaning of CONSCIENTIOUS is exercising attentive care to avoid errors or omissions : concerned with doing something correctly : meticulous, careful. How to use conscientious in a sentence.

For conscientious members of a community, they provide at least additional reasons for conformity to the law.

CONSCIENTIOUS definition: governed by conscience; controlled by or done according to one's inner sense of what is right; principled. See examples of conscientious used in a sentence.

Definition of conscientious adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

1. meticulous; careful; painstaking. 2. governed by or done according to conscience; scrupulous: a conscientious judge.

3 days ago · Adjective conscientious (comparative more conscientious, superlative most conscientious) Thorough, careful, or vigilant in one’s task performance; painstaking.

What does the adjective conscientious mean? There are four meanings listed in OED's entry for the adjective conscientious, one of which is labelled obsolete, and one of which is considered derogatory.

WordReference Random House Unabridged Dictionary of American English © 2026 con•sci•en•tious (kon′shē en′ shəs, kon′sē-), adj. controlled by or done according to conscience; scrupulous: a …

Someone who is conscientious is very careful to do their work properly. We are generally very conscientious about our work.

Thorough, careful, or vigilant; implies a desire to do a task well. He was a thoughtful and conscientious worker.