- (a.) Well advanced in any branch of knowledge or skill; possessed of considerable acquirements; well-skilled; versed; adept,.
- (n.) One who has made considerable advances in any business, art, science or branch of learning; an expert; an adept; as, proficient in a trade; a proficient in mathematics, music, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). proficient. Retrieved September 24, 2026, from http://smartdefine.org/proficient/definitions/2049594 |
| Chicago | Webster's. 2011. "proficient" http://smartdefine.org/proficient/definitions/2049594 (accessed September 24, 2026). |
| Harvard | Webster's 2011, proficient, Smart Define, viewed 24 September, 2026, <http://smartdefine.org/proficient/definitions/2049594>. |
| MLA | Webster's. "proficient" 27 May 2011. Web. 24 September 2026. <http://smartdefine.org/proficient/definitions/2049594> |