Floor
noun
The kanji and the word are exactly the same. That means they share meanings as well.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
You look at the floor. It's disgusting. Dirtiest and nastiest floor you've ever seen. You say yucka (ゆか) because it's covered in yucca (ゆか). Plus, it's all rotten.
今日は床掃除をしなければならないの。
I'll have to clean floor today.
床に一匹のゴキブリがはっていた。
A cockroach was crawling on the floor.
テレビを見てる時は、大抵足を組みながら床に寝転がっています。
When I watch TV, I usually lay on the floor with my legs crossed.