quarterly adjective 2adverb 2noun 1forms 1 adjective2 •Occurring once every quarter year (three months); taking place quarter-yearly. •(of a coat of arms) Divided into four parts crosswise.The arms of Hohenzollern is quarterly argent and sable. adverb2 •Once every quarter year (three months). •In the four, or in two diagonally opposite, quarters of a shield. noun1 •A periodical publication that appears four times per year. formsquarterlies