(n.) The state or quality of lasting; continuance in time; the portion of time during which anything exists.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). duration. Retrieved September 20, 2026, from http://smartdefine.org/duration/definitions/2001065 |
| Chicago | Webster's. 2011. "duration" http://smartdefine.org/duration/definitions/2001065 (accessed September 20, 2026). |
| Harvard | Webster's 2011, duration, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/duration/definitions/2001065>. |
| MLA | Webster's. "duration" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/duration/definitions/2001065> |