What does 階 (kai | かい) mean in Japanese?

The Japanese word

このビルは何階建てですか。
kono biru wa nan kai date desu ka.
How many floors does this building have?

あのビルは何階建てですか。
ano biru wa nan kai date desu ka.
How many floors does that building have?

こちらのビルは３階建てです。
kochira no biru wa san kai date desu.
This building has three floors.

ディナーを食べに階下に行こう。
dinā o tabe ni kaika ni iko u.
Let's go downstairs for dinner.

下の階で待ってて。すぐ行くから。
shita no kai de matte te. sugu iku kara.
Wait for me downstairs. I'll be there in a minute.

階段の下で待ってて。すぐ行くよ。
kaidan no shita de matte te. sugu iku yo.
Wait for me downstairs. I'll be there in a minute.

二階に行ってちょっと横になったら？
ni kai ni itte chotto yoko ni nattara?
Why don't you go upstairs and lie down for a while?

私は鍵をもらい、二階の部屋へ行った。
watashi wa kagi o morai, ni kai no heya e itta.
I asked for the key and went upstairs to my room.

下階で誰かがあなたを待っていますよ。
shita kai de dare ka ga anata o matte i masu yo.
Someone is waiting for you downstairs.

これを二階まで運んでいただけませんか？
kore o ni kai made hakon de i ta dake masen ka?
Would you carry this upstairs for me? | Would you carry this up to the second floor for me? | Would you carry this down to the second floor for me?

男性用のトイレは1階と3階にございます。
dansei yō no toire wa 1 kai to 3 kai ni gozai masu.
The men's restrooms are located on floors 1 and 3.

トムはエレベーターに乗って3階のボタンを押した。
tomu wa erebētā ni notte 3 kai no botan o oshi ta.
Tom got on the elevator and pressed the button for the third floor.

新しい貿易区域の計画はまだ実施の段階にありません。
atarashī bōeki kuiki no keikaku wa mada jisshi no dankai ni ari masen.
Plans for a new trade zone are still on the drawing board.

このエレベーターは2階・3階には停止いたしません。
kono erebētā wa 2 kai . 3 kai ni wa teishi itashi masen.
This elevator doesn't stop at the second or third floors.

フロントデスクで鍵を求めてから、私は自分の階までエレベーターに乗った。
furonto desuku de kagi o motome te kara, watashi wa jibun no kai made erebētā ni notta.
After asking for my key at the front desk, I took the elevator to my floor.

自慢じゃないが僕は通知表の家庭科で３以上を取ったことがない。１０段階評価で。
jiman ja nai ga boku wa tsūchi hyō no katei ka de san ijō o totta koto ga nai. ichi zero dankai hyōka de.
Not wanting to boast but I've never got better than a 3 on my report card for home economics. Out of 10 that is.

２階に予備の部屋が二部屋ありますが、そのどちらもここ数年使用されていません。
ni kai ni yobi no heya ga ni heya ari masu ga, sono dochira mo koko sū nen shiyō sa re te i masen.
We have two spare rooms upstairs, neither of which has been used for years.

	The Japanese word
	階
	is pronounced
	kai \| かい
	means
	counter for floors, strories

	Examples:
	このビルは何階建てですか。 kono biru wa nan kai date desu ka. How many floors does this building have?
	あのビルは何階建てですか。 ano biru wa nan kai date desu ka. How many floors does that building have?
	こちらのビルは３階建てです。 kochira no biru wa san kai date desu. This building has three floors.
	ディナーを食べに階下に行こう。 dinā o tabe ni kaika ni iko u. Let's go downstairs for dinner.
	下の階で待ってて。すぐ行くから。 shita no kai de matte te. sugu iku kara. Wait for me downstairs. I'll be there in a minute.
	階段の下で待ってて。すぐ行くよ。 kaidan no shita de matte te. sugu iku yo. Wait for me downstairs. I'll be there in a minute.
	二階に行ってちょっと横になったら？ ni kai ni itte chotto yoko ni nattara? Why don't you go upstairs and lie down for a while?
	私は鍵をもらい、二階の部屋へ行った。 watashi wa kagi o morai, ni kai no heya e itta. I asked for the key and went upstairs to my room.
	下階で誰かがあなたを待っていますよ。 shita kai de dare ka ga anata o matte i masu yo. Someone is waiting for you downstairs.
	これを二階まで運んでいただけませんか？ kore o ni kai made hakon de i ta dake masen ka? Would you carry this upstairs for me? \| Would you carry this up to the second floor for me? \| Would you carry this down to the second floor for me?
	男性用のトイレは1階と3階にございます。 dansei yō no toire wa 1 kai to 3 kai ni gozai masu. The men's restrooms are located on floors 1 and 3.
	トムはエレベーターに乗って3階のボタンを押した。 tomu wa erebētā ni notte 3 kai no botan o oshi ta. Tom got on the elevator and pressed the button for the third floor.
	新しい貿易区域の計画はまだ実施の段階にありません。 atarashī bōeki kuiki no keikaku wa mada jisshi no dankai ni ari masen. Plans for a new trade zone are still on the drawing board.
	このエレベーターは2階・3階には停止いたしません。 kono erebētā wa 2 kai . 3 kai ni wa teishi itashi masen. This elevator doesn't stop at the second or third floors.
	フロントデスクで鍵を求めてから、私は自分の階までエレベーターに乗った。 furonto desuku de kagi o motome te kara, watashi wa jibun no kai made erebētā ni notta. After asking for my key at the front desk, I took the elevator to my floor.
	自慢じゃないが僕は通知表の家庭科で３以上を取ったことがない。１０段階評価で。 jiman ja nai ga boku wa tsūchi hyō no katei ka de san ijō o totta koto ga nai. ichi zero dankai hyōka de. Not wanting to boast but I've never got better than a 3 on my report card for home economics. Out of 10 that is.
	２階に予備の部屋が二部屋ありますが、そのどちらもここ数年使用されていません。 ni kai ni yobi no heya ga ni heya ari masu ga, sono dochira mo koko sū nen shiyō sa re te i masen. We have two spare rooms upstairs, neither of which has been used for years.

	Examples sourced from tatoeba.org