(uncountable) The act of securing authorization rights independently from the intermediaries that utilize them and the parties to which they apply

plural of master-at-arms

(UK, Navy) A warrant officer or chief petty officer responsible for discipline aboard a naval ship.

(idiomatic, US) Used to return a greeting or insult.

Alternative spelling of at large

A jockstrap (or similar)

plural of athletic protector

Alternative form of Athenaeum: a temple primarily dedicated to Athena or her Roman equivalent Minerva. / An association for the advancement of learning, particularly in science or literature.

plural of at symbol

plural of at sign