quarterly (Adjective) — Of or relating to or consisting of a quarter. ex. "quarterly report"
quarterly (Noun) — A periodical that is published every quarter (or four issues per year).
quarterly (Adverb) — In diagonally opposed quarters of an escutcheon. ex. "two coats of arms borne quarterly"
quarterly (Adverb) — In three month intervals. ex. "interest is compounded quarterly"