- (a.) Devoted to labor; diligent; industrious; as, a laborious mechanic.
- (a.) Requiring labor, perseverance or sacrifices; toilsome; tiresome.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). laborious. Retrieved September 23, 2026, from http://smartdefine.org/laborious/definitions/2026014 |
| Chicago | Webster's. 2011. "laborious" http://smartdefine.org/laborious/definitions/2026014 (accessed September 23, 2026). |
| Harvard | Webster's 2011, laborious, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/laborious/definitions/2026014>. |
| MLA | Webster's. "laborious" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/laborious/definitions/2026014> |