[aux.il.ia.ry] adj [L auxiliaris, fr. auxilium help; akin to L augere to increase--more at eke] (15c) 1 a: offering or providing help b: functioning in a subsidiary capacity "an ~ branch of the state university"
2. of a verb: accompanying another verb and typically expressing person, number, mood, or tense 3 a: supplementary b: constituting a reserve "an ~ power plant"
4: equipped with sails and a supplementary inboard engine
auxiliary n, pl -ries (1601) 1 a: an auxiliary person, group, or device; specif: a member of a foreign force serving a nation at war b: a Roman Catholic titular bishop assisting a diocesan bishop and not having the right of succession--called also auxiliary bishop
2: an auxiliary boat or ship
3: an auxiliary verb