Dictionary.net

A drum made of a hollow hemisphere of copper or brass with parchment stretched over the opening.

A drum made of a metal vessel like a kettle, and covered with parchment: a tea-party.

A musical instrument, consisting of a brass hemispherical shell, with a parchment head; formerly used by mounted troops, now chiefly in orchestras.

A ladies informal afternoon party; so named from parties in India, where drumheads served for tables.

n. A drum made of a copper vessel, usually hemispherical or shaped like a kettle, covered with parchment or skin ; - an evening entertainment in fashionable life ; a rout.