B1
one of the two soft edges of the mouth
Dictionary examples:
His lips were moving, but all I heard was 'blah blah blah'. (0.0)
He bit his lip so hard trying not to laugh in class. (0.0)
I practiced smiling in the mirror until my lips hurt. (0.0)
My lips are dry from the cold. (18.1)
He licked his lips. (31.2)