1. Giving assistance or support; helping. 2. Acting as a subsidiary; supplementary: the main library and its auxiliary branches.3. Held in or used as a reserve: auxiliary troops; an auxiliary power generator.4.Nautical Equipped with a motor as well as sails. 5.Grammar Of, relating to, or being an auxiliary verb.
NOUN:
Inflected forms: pl. aux·il·ia·ries 1. An individual or group that assists or functions in a supporting capacity: a volunteers' auxiliary at a hospital.2. A member of a foreign body of troops serving a country in war. 3.Grammar An auxiliary verb. 4.Nauticala. A sailing vessel equipped with a motor. b. A vessel, such as a supply ship or a tug, that is designed for and used in instances and services other than combat.
ETYMOLOGY:
Middle English, from Latin auxilirius, from auxilium, help. See aug- in Appendix I.