1Winning overall in a tournament or competition, coming in first place; can also refer to the winning person or team.
うちの高校が甲子園で優勝した。
Our high school won the championship at Koshien.
彼は昨年に続き、今年も優勝を果たした。
He won the championship again this year, following last year's title.
優勝チームには賞金と優勝カップが贈られる。
The winning team is awarded prize money and a championship cup.
決勝で敗れ、優勝を逃した。
They lost in the final and missed out on the championship.
2A colloquial slang term (chiefly used online and by younger speakers) meaning something is extremely satisfying or "the best" — close in feel to saying "perfection."
この曲、イントロから優勝すぎる。
This song is just perfection from the very first intro.
推しが今日もかわいくて優勝でした。
My favorite idol was adorable again today — an absolute win.