All 5 Uses

mock
in
Queen of Attolia
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"I was so looking forward to my next visit," he said with mock chagrin, and, chuckling, people returned to their conversations.†
Chpt 11 *
Her fiancé stopped in her rooms with a face so full of mock solemnity it was an insult and told her that her father had been poisoned by some unknown assassin.†
Chpt 12
Alone, because she had known, even then, that she would turn on any guard who mocked the Thief's pain.†
Chpt 15 *
She worried that her Thief's great capacity for mockery might resurface to disastrous consequences, but Eugenides only bowed politely when introduced, and his bland expression was as fixed as Attolia's, even as she looked right through him, returning a royal half curtsy to his bow.†
Chpt 20
"Insane to think of loving me," said Attolia, and the emotions that colored her usually emotionless voice were bitterness and self-mockery.†
Chpt 21

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.