Definition of "auxiliary" in English

adjective

1. Helping; giving assistance or support.

   • auxiliary troops

2. Supplementary or subsidiary.

3. Held in reserve for exceptional circumstances.

4. (nautical) Of a ship, having both sails and an engine.

5. (grammar) Relating to an auxiliary verb.

noun

1. A person or group that acts in an auxiliary manner.

2. (nautical) A sailing vessel equipped with an engine.

3. (grammar) Ellipsis of auxiliary verb.

4. A marching band color guard.