Apa itu auxiliary? Apa itu auxiliary? Giving assistance or support; helping.Acting as a subsidiary; supplementary: the main library and its auxiliary branches. Held in or used as a reserve: auxiliary troops; an auxiliary power generator. Nautical Equipped with a motor as well as sails.Grammar Of, relating to, or being an auxiliary verb.An individual or group that assists or functions in a supporting capacity: a volunteers' auxiliary at a hospital. A member of a foreign body of troops serving a country in war.Grammar An auxiliary verb.Nautical A sailing vessel equipped with a motor.Nautical A vessel, such as a supply ship or a tug, that is designed for and used in instances and services other than combat.