Merriam-Webster's Collegiate® Dictionary, 11th Edition
LIP
I. noun
Etymology: Middle English, from Old English lippa; akin to Old High German leffur lip and probably to Latin labium, labrum lip Date: before 12th century either of two fleshy folds that surround the mouth in humans and many other vertebrates and are organs of human speech essential to certain articulations, back talk ,
3. a fleshy edge or margin (as of a wound), labium , labellum 1, a limb of a labiate corolla,
4. the edge of a hollow vessel or cavity, a projecting edge: as, the beveled upper edge of the mouth of an organ flue pipe, the sharp cutting edge on the end of a tool (as an auger), a short spout (as on a pitcher), edge 2, embouchure , lipless adjective liplike adjective
II. adjective
Date: 1558
insincere , produced with the participation of the lips ; labial ,
III. verb (lipped; lipping)
Date: 1589
transitive verb to touch with the lips, utter , to lap against ; lick , to hit (a putt) so that the ball hits the edge of the cup but fails to drop in, intransitive verb to hit the edge of the cup without dropping in