Conferring aid or help; helping; aiding; assisting; subsidiary; as auxiliary troops.
A helper; an assistant; a confederate in some action or enterprise.
Foreign troops in the service of a nation at war; (rarely in sing.), a member of the allied or subsidiary force.
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.
A quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulae.
Man has, as it were, become a kind of prosthetic God. When he puts on all his auxiliary organs, he is truly magnificent; but those organs have not grown on him and they still give him much trouble at times. Sigmund Freud
When I started walking and I looked down and I saw on the floor this water, which looked like, you know, water in your basement except it happened to be in the auxiliary building of a nuclear power plant. William Scranton