Antonyms of adj crestfallen

1 sense of crestfallen

Sense 1
chapfallen, chopfallen, crestfallen, deflated -- (brought low in spirit; "left us fatigued and deflated spiritually")

INDIRECT (VIA dejected) -> elated -- (exultantly proud and joyful; in high spirits; "the elated winner"; "felt elated and excited")

Similarity of adj crestfallen

1 sense of crestfallen

Sense 1
chapfallen, chopfallen, crestfallen, deflated -- (brought low in spirit; "left us fatigued and deflated spiritually")
       => dejected (vs. elated) -- (affected or marked by low spirits; "is dejected but trying to look cheerful")