Dictionary:

cassation

  (kă-sā'shən)

Abrogation or annulment by a higher authority.

[Middle English cassatioun, from Old French cassation, from Late Latin cassātiō, cassātiōn-, from cassātus, past participle of cassāre, to annul. See quash¹.]

Term of uncertain derivation used by Haydn, Mozart and others for pieces resembling a serenade or divertimento.