- additional; supplementary; reserve: an auxiliary police force.
- used as a substitute or reserve in case of need: The hospital has an auxiliary power system in case of a blackout.
- (of a boat) having an engine that can be used to supplement the sails: an auxiliary yawl.
- giving support; serving as an aid; helpful: The mind and emotions are auxiliary to each other. Passion is auxiliary to art.
- a person or thing that gives aid of any kind; helper.
- an organization allied with, but subsidiary to, a main body of restricted membership, especially one composed of members' relatives: The men's club and the ladies' auxiliary were merged into one organization.
- auxiliary verb.
- foreign troops in the service of a nation at war.
- a naval vessel designed for other than combat purposes, as a tug, supply ship, or transport.
- a sailing vessel carrying an auxiliary propulsion engine or engines.
- secondary or supplementary
- supporting
- (of a sailing vessel) having an engine
- a person or thing that supports or supplements; subordinate or assistant
- nautical
- a sailing vessel with an engine
- the engine of such a vessel
- a vessel such as a tug, hospital ship, etc, not used for combat
