✳ celebration (noun) Sounds: - /ˌsɛlɪˈbɹeɪʃən/ Forms: - celebrations (plural) celebration (noun) senses: 1. The formal performance of a solemn rite, such as Christian sacrament. 2. The observance of a holiday or feast day, as by solemnities. 3. The act, process of showing appreciation, gratitude and/or remembrance, notably as a social event. ...