All 3 Uses

mock
in
Breaking Dawn, by Meyer
(Auto-generated)

His voice changed, took on a defensive, mocking edge.†
Book 1 *
Edward touched his fist lightly to Jasper's shoulder in a mock punch.†
Book 3 *
"That's different," Jacob said, and I watched in surprise as he mock-punched Edward's shoulder.†
Book 3

Definitions:

(1) (mock as in: don't mock me)
make fun of (ridicule--sometimes by imitating in an exaggerated manner)

or (more rarely): just to make fun or to be ridiculous without targeting anyone as a victim

These senses of mockery come together when a comedian pokes fun at a politician by pretending to be the politician and saying ridiculous things.
(2) (mock as in: a mock trial)
not real
(3) (meaning too rare to warrant focus)
Less commonly, mock can refer to a way of preparing food. Mockers can be an abbreviation for mockingbirds.