- (v.t.) To lie under; to rest beneath; to be situated under; as, a stratum of clay underlies the surface gravel.
- (v.i.) To lie below or under.
- (v.t.) To be at the basis of; to form the foundation of; to support; as, a doctrine underlying a theory.
- (n.) See Underlay, n., 1.
- (v.t.) To be subject or amenable to.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). underlie. Retrieved September 20, 2026, from http://smartdefine.org/underlie/definitions/2076702 |
| Chicago | Webster's. 2011. "underlie" http://smartdefine.org/underlie/definitions/2076702 (accessed September 20, 2026). |
| Harvard | Webster's 2011, underlie, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/underlie/definitions/2076702>. |
| MLA | Webster's. "underlie" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/underlie/definitions/2076702> |