noun
General term for the floor of a room or building.
床に座ってテレビを見る。
I sit on the floor and watch TV.
床をきれいに掃除してください。
Please clean the floor thoroughly.
Specific to traditional Japanese performing arts such as jōruri or naniwa-bushi, where the narrator and shamisen player perform on a slightly raised platform.
義太夫節では、太夫と三味線弾きが床に上がる。
In gidayū-bushi, the narrator and shamisen player go up onto the stage.
noun
dining platform built across a river
A traditional riverside dining platform, historically built over a river or stream, often associated with Kyoto's kawadoko dining culture.
京都の夏には、川床で食事を楽しむことができる。
In summer in Kyoto, you can enjoy a meal on a riverside dining platform.
The kanji 床 originally referred to a raised platform or bed, and by extension came to mean 'floor'. The reading ゆか is native Japanese, with uncertain earlier derivation.