- (v.t.) Fig.: To remove the foundation or support of by clandestine means; to ruin in an underhand way; as, to undermine reputation; to undermine the constitution of the state.
- (v.t.) To excavate the earth beneath or the part of, especially for the purpose of causing to fall or be overthrown; to form a mine under; to sap; as, to undermine a wall.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). undermine. Retrieved September 20, 2026, from http://smartdefine.org/undermine/definitions/2076716 |
| Chicago | Webster's. 2011. "undermine" http://smartdefine.org/undermine/definitions/2076716 (accessed September 20, 2026). |
| Harvard | Webster's 2011, undermine, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/undermine/definitions/2076716>. |
| MLA | Webster's. "undermine" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/undermine/definitions/2076716> |