A person or group that acts in an auxiliary manner.
Auxiliaries and ancillaries are comprehensive, and include a Westinghouse motor-driven recriprocating compressor used for locomotive braking and general service air, two rotary exhauster sets for train brakes when hauling passenger or fitted freight trains, and an oil-fired train heating boiler.
A sailing vessel equipped with an engine.
From Latin auxiliārius (“assistant, ally”), equiv. to auxiliāris (“helping, aiding”), from auxilium (“help, aid”), from augēre (“to increase”).
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Ellipsis of auxiliary verb.
The three traditionally recognized Non-modal Auxiliaries are the per- fective Auxiliary have, the progressive Auxiliary be, and the passive Auxiliary be. Perfective have is so-called because it marks the completion (hence, perfec- tion) of an action; it is followed by a VP headed by a perfective -n participle, as in: (121) The referee has [_(VP) shown him the red card]