Auxiliary, which comes from the Latin noun auxilium, meaning “aid,” “assistance,” or “reinforcement,” is used in a wide range of capacities in English to describe a person or thing that assists another.

AUXILIARY definition: 1. giving help or support, especially to a more important person or thing: 2. a person whose job…. Learn more.

AUXILIARY definition: additional; supplementary; reserve. See examples of auxiliary used in a sentence.

An auxiliary is an organization that is connected with, but less important than, another organization; for example, an organization for the wives of the members of the main organization.

Auxiliary definition: Giving assistance or support; helping.

Jan 20, 2026 · Noun auxiliary (plural auxiliaries) A person or group that acts in an auxiliary manner.

Define auxiliary. auxiliary synonyms, auxiliary pronunciation, auxiliary translation, English dictionary definition of auxiliary. adj. 1. Giving assistance or support; helping.