Antonyms of adj triumphant

2 senses of triumphant

Sense 1
exultant, exulting, jubilant, prideful, rejoicing, triumphal, triumphant -- (joyful and proud especially because of triumph or success; "rejoicing crowds filled the streets on VJ Day"; "a triumphal success"; "a triumphant shout")

INDIRECT (VIA elated) -> dejected -- (affected or marked by low spirits; "is dejected but trying to look cheerful")

Sense 2
triumphant, victorious -- (experiencing triumph)

INDIRECT (VIA undefeated) -> defeated -- (beaten or overcome; not victorious; "the defeated enemy")

Similarity of adj triumphant

2 senses of triumphant

Sense 1
exultant, exulting, jubilant, prideful, rejoicing, triumphal, triumphant -- (joyful and proud especially because of triumph or success; "rejoicing crowds filled the streets on VJ Day"; "a triumphal success"; "a triumphant shout")
       => elated (vs. dejected) -- (exultantly proud and joyful; in high spirits; "the elated winner"; "felt elated and excited")

Sense 2
triumphant, victorious -- (experiencing triumph)
       => undefeated (vs. defeated) -- (victorious; "undefeated in battle"; "an undefeated team")