Being jubilant is defined as expressing or feeling great happiness, triumph, or joy. The antonyms, on the other hand, are words that describe the opposite of feeling jubilant. These words are somber, sad, melancholy, miserable, and wistful. Somber implies a serious, solemn or gloomy mood, without any joy, happiness, or celebration. Sad describes a feeling of sorrow, grief, or depression. Melancholy implies a feeling of deep sadness and a depressed mood. Miserable describes an unhappy or unpleasant condition. Wistful describes a feeling of sentimental yearning or longing for something or someone that is unattainable. These words are the antonyms that represent an opposite meaning to being jubilant.