AUXIL'IAR, AUXIL'IARIES, noun plural Foreign troops in the service of nations at war. AUXIL'IARY, noun 1. A helper; an assistant; a confederate in some action, enterprise or undertaking. 2. In grammar, a verb which helps to form the modes and tenses of other verbs; as, have, be, may, can, do, must, shall and will, in English.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI