Celebrative refers to something that's full of celebration, revelry, and joy. The antonyms for celebrative contrast its meaning and refer to things that are the opposite of celebrative. The antonyms for celebrative include somber, melancholic, gloomy, mournful, andserious. None of these words evoke the same sense of happiness and excitement that celebrative does. Celebrative is often associated with grand events, parties, and festivities. In contrast, the antonyms for celebrative are more apt to describe more reflective, somber, or quiet situations that have little reason to celebrate. When using celebrative, it's important to keep these antonyms in mind to ensure that the intended meaning is not vague or unclear.