All 3 Uses of

mock
in
The Age of Innocence

One feels that," she cried, missing the mockery.†
Chpt 9 *

mockery = something that is ridiculous

The ostensible reason of his appearance was the discovery, the very night before, of a "perfect little house," not in the market, which was really just the thing for her, but would be snapped up instantly if she didn't take it; and he was loud in mock-reproaches for the dance she had led him in running away just as he had found it.†
Chpt 15 *

Whose hand did you think you were kissing, young man—your wife's, I hope?" the old lady snapped out with her mocking cackle; and as he rose to go she called out after him: "Give her her Granny's love; but you'd better not say anything about our talk."†
Chpt 30

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)
meaning too rare to warrant focus:

Less commonly, mock can refer to a way of preparing food. Mockers can be an abbreviation for mockingbirds.