from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Giving assistance or support; helping.
  • adjective Acting as a subsidiary; supplementary.
  • adjective Held in or used as a reserve.
  • adjective Nautical Equipped with a motor as well as sails.
  • adjective Grammar Of, relating to, or being an auxiliary verb.
  • noun An individual or group that assists or functions in a supporting capacity.
  • noun A member of a foreign body of troops serving a country in war.
  • noun Grammar An auxiliary verb.
  • noun A sailing vessel equipped with a motor.
  • noun A vessel, such as a supply ship or a tug, that is designed for and used in instances and services other than combat.

from The Century Dictionary.

  • noun In the nomenclature of the sutural inflections in the ammonoid cephalopods, a lobe or saddle lying between the umbilical curve or line of involution and the second lateral lobe.
  • noun In mech., any machine except the principal one: a term applied specifically to the feed-pumps, fire-pumps, etc., in power plants.
  • noun A vessel fitted with power other than sails for propulsion but depending ordinarily on the latter.
  • Helping; aiding; assisting; giving support or succor; hence, subsidiary; additional: as, auxiliary troops; auxiliary engines.
  • noun A helper; an assistant; a confederate in some action, enterprise, or undertaking; an aid of any kind.
  • noun Specifically—2. plural Foreign troops in the service of a nation at war.
  • noun In grammar, a verb used in forming, with the infinitive and participles of other verbs, phrases having the value of, or a value analogous to that of, modes and tenses: thus, I do love, I have loved, I shall love, I am loved.
  • noun In mathematics, an auxiliary quantity (which see, under I.).

from the GNU version of the Collaborative International Dictionary of English.

  • noun A helper; an assistant; a confederate in some action or enterprise.
  • noun (Mil.) Foreign troops in the service of a nation at war; (rarely in sing.), a member of the allied or subsidiary force.
  • noun (Gram.) A verb which helps to form the voices, modes, and tenses of other verbs; -- called, also, an auxiliary verb
  • noun (Math.) A quantity introduced for the purpose of simplifying or facilitating some operation, as in equations or trigonometrical formulæ.
  • adjective Conferring aid or help; helping; aiding; assisting; subsidiary; as auxiliary troops.
  • adjective (Mus.) the scales of relative or attendant keys. See under Attendant, a.
  • adjective (Gram.) See Auxiliary, n., 3.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Helping; giving assistance or support.
  • adjective Supplementary or subsidiary.
  • adjective Held in reserve for exceptional circumstances.
  • adjective nautical Of a ship, having both sails and an engine.
  • adjective grammar Relating to an auxiliary verb.
  • noun A person or group that acts in an auxiliary manner.
  • noun A sailing vessel equipped with an engine.
  • noun grammar An auxiliary verb.
  • noun A marching band colorguard.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective furnishing added support
  • adjective functioning in a supporting capacity
  • noun someone who acts as assistant


from The American Heritage® Dictionary of the English Language, 4th Edition

Middle English, from Latin auxiliārius, from auxilium, help; see aug- in Indo-European roots.

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Latin auxiliarius, equiv. to auxiliaris ("helping, aiding"), from auxilium ("help, aid"), from augere ("to increase").


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