Meaning of じゃないか in Japanese

It seems that your search contains the following:

Definition of じゃないか

じゃないか(janaika) · ではないか(dehanaika) · ちゃうか(chauka)

ええじゃないか(eejanaika)

(exp) isn't it great?
(n) carnival-like religious celebrations (e.g. dancing festivals) that occurred across Japan from June 1867 to May 1868

"I don't think she's an opponent you can ignore like that ..." "That's right, they say a cornered rat bites back, don't they?"

Wha? Study, reflexes, all the parameters are MAX! You've even saved money up to the limit ... Amazing.

ここらで１０分ふん、休憩きゅうけいしようするじゃないか。

Let's take a 10-minute break.

You wouldn't be so casual about it if you were directly involved.

お前、会議かいぎ中じゅうあくびばかりしてたするじゃないか。

You should have seen yourself, yawning all through the meeting.

I say it all the time.

いい人ひとみたいじゃないか。

He seems like quite a find.

Let's get things ready beforehand.

あした雨あめが降るんふるじゃないかと心配しんぱいだ。

I'm afraid it will rain tomorrow.

He lives a freewheeling life. I think he ought to settle down a little.