What is the meaning of the word "lap"?

Definitions:

a flap that lies over another part noun
- the lap of the shingles should be at least ten inches
an area of control or responsibility noun
- the job fell right in my lap
movement once around a course noun
- We drove an extra lap just for insurance.
take up with the tongue verb
- The cat lapped up the milk
the part of a piece of clothing that covers the thighs noun
- My lap was covered with food stains.
the upper side of the thighs of a seated person noun
- Since I didn't have a table, I ate with the plate on my lap.
touching with the tongue noun
- the dog's laps were warm and wet