adj

• (obsolete) auxiliary
  "The auxiliar troops and Trojan hosts appear."

noun

• (archaic) An auxiliary.
  "Agricola, who perceav'd that the noiſe of this defeat had alſo in the Province deſirous of novelty, ſtirr'd up new expectations, reſolves to be before-hand with the danger : and drawing together the choice of his Legions with a competent number of Auxiliars, not beeing met by the Ordovices, who kept the Hills, himſelf in the head of his men hunts them up and down through difficult places, almoſt to the final extirpating of that whole Nation. With the ſame current of ſucceſs, what Paulinus had left unfiniſh'd he Conquers in the Ile of Mona: for the Ilanders altogether fearleſs of his approach, whom they knew to have no Shipping, when they ſaw themſelves invaded on a ſudden by the Auxiliars, whoſe Countrie uſe had taught them to ſwimm over with Horſe and Armes, were compel'd to yeild."