Word forms: celebrations 1. countable noun B1 A celebration is a special enjoyable event that people organize because something pleasant has happened or because it is someone's birthday or anniversary. I can tell you, there was a celebration in our house that night. ...his eightieth birthday celebrations. Synonyms: party, festival, gala, jubilee More Synonyms of celebration 2. singular noun The celebration of something is praise and appreciation which is given to it