na-adjective, noun which may take the genitive case particle 'no', noun
triumphant air; smugness
Describes a facial expression or attitude of obvious self-satisfaction, often with a nuance of smugness. Commonly used in the phrase 得意満面の笑み (a smug/triumphant smile).
彼は得意満面の笑みを浮かべた。
He wore a smug smile.
Having passed the exam, he came home with a triumphant air.
He came in first on the test and flashed a triumphant smile.
The champion athlete looked absolutely triumphant.
He showed off his work with a smug, triumphant air.
得意満面 focuses on a face beaming with pride, whereas 意気揚々 describes an overall triumphant bearing or gait.