adjective
Helping; giving assistance or support.
Supplementary or subsidiary.
Held in reserve for exceptional circumstances.
(nautical) Of a ship, having both sails and an engine.
(grammar) Relating to an auxiliary verb.
noun
A person or group that acts in an auxiliary manner.
(nautical) A sailing vessel equipped with an engine.
(grammar) Ellipsis of auxiliary verb.
A marching band color guard.