Pronunciation (UK) IPA (key): /ækˈtɪv.ɪ.tiːz/ or /ækˈtɪv.ə.tiːz/ (US) IPA (key): /ækˈtɪv.ɪ.tiz/ or [ækˈtɪv.ɪ.ɾiz] or /ækˈtɪv.ə.tiz/ or [ækˈtɪv.ə.ɾiz] Audio (US)(file) Hyphenation: ac‧tiv‧i‧ties Noun Singular activity Plural activities The plural form of activity; more than one (kind of) activity. Related words active activelyWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads