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