yearly UK /ˈjɪəli/US /ˈjɪɹli/adjective 2adverb 2noun 1forms 1 adjective2 •Happening once every year.Christmas is a yearly celebration.We deep-clean the kitchen lustrally, on a five-yearly basis. •Over the course of one year adverb2 •Once a year. •Every year. noun1 •Something that is published once a year. formsyearlies