either the outer margin or the inner margin of the aperture of a gastropod's shell | a sharp side formed by the intersection of two surfaces of an object |
the top edge of a vessel or other container | the outside limit of an object or area or surface; a place farthest away from the center of something |
either of two fleshy folds of tissue that surround the mouth and play a role in speaking | a slight competitive advantage |
an impudent or insolent rejoinder | the attribute of urgency in tone of voice |
(botany) either of the two parts of a bilabiate corolla or calyx | the boundary of a surface |
| a line determining the limits of an area |