Auxiliary

1. a. Conferring aid or help; helping; aiding; assisting; subsidiary; as auxiliary troops.
2. n. A helper; an assistant; a confederate in some action or enterprise.
3. n. Foreign troops in the service of a nation at war; (rarely in sing.), a member of the allied or subsidiary force.
4. sing. A verb which helps to form the voices, modes, and tenses of other verbs; — called, also, an auxiliary verb; as, have, be, may, can, do, must, shall, and will, in English; etre and avoir, in French; avere and essere, in Italian; estar and haber, in Spanish.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.