Platform; podium; rostrum; pulpit — a raised place used for speeches or ceremonies.
市長は壇上でスピーチを行った。
The mayor gave a speech on the podium.
演奏会の指揮者が壇に上がった。
The conductor went up onto the platform for the concert.
(Ceremonial) mound; altar — a ceremonial mound or altar used in rituals.
寺の奥に古い祭壇が残っている。
There is an old altar remaining in the back of the temple.
供物は壇に丁寧に置かれた。
Offerings were carefully placed on the altar.
Suffix meaning 'the world/circle of ~' (e.g., haiku world, art circles) — used in compounds like 俳壇.
彼は俳壇に名を残した俳人だ。
He is a haiku poet who left his name in the haiku world.
芸壇での評価は人それぞれだ。
Reputation in the art circles varies from person to person.
Archaic usage referring to a mandala or ritual platform (Buddhist/esoteric contexts).
古文献には壇が曼荼羅を意味する場合がある。
In old texts, '壇' can sometimes mean a mandala.