Dejected is an adjective used to describe someone who is sad, disheartened, or disappointed. Synonyms for this word can include dispirited, crestfallen, crestfallenly, despondent and downcast. Other synonyms might include forlorn, melancholy or gloomy, but these may imply a more long-lasting or severe sadness than dejected. Another word that can be used with similar connotations is 'low', for example, "he was feeling low" is similar to "he was feeling dejected." Lastly, 'discouraged' and 'deflated' also convey a sense of disappointment and sadness, but with less emphasis on the emotional weight of the feeling.