What is Lip ?
Lip is (noun) 1. one of the two fleshy parts forming the outside of the mouth Put some cream on your lips to stop them getting chapped. to lick your lips to show that you expect something to be enjoyable They licked their lips when they saw the cakes. my lips are sealed I have promised not to say anything 2. the edge of a round deep container such as a cup There’s a chip on the lip of that cup. 3. the edge of a round deep hole in the ground They stood on the lip of the crater and looked down into the volcano.
source: Easier English, Student Dictionary Upper Intermediate Level