The action of mocking; ridicule, derision.
Something so lacking in necessary qualities as to inspire ridicule; a laughing-stock.
Something insultingly imitative; an offensively futile action, gesture etc.
Mimicry, imitation, now usually in a derogatory sense; a travesty, a ridiculous simulacrum.
The defendant wasn't allowed to speak at his own trial - it was a mockery of justice.