Pronunciation IPA (key): /ɪn.vɪˈteɪ.ʃən/ or /ɪn.vɪˈteɪ.ʃn̩/ Audio (US)(file) Noun Singular invitation Plural invitations (countable) If you receive an invitation, you are being asked to attend an event. The wedding invitations were mailed a week ago. An invitation to a party can be a written one or a verbal one. My little boy received an invitation to a schoolmate's birthday party.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads