Meaning of ことがある in Japanese

It seems that your search contains the following:

Definition of ことがある

ことがある(kotogaaru) 【事がある】

(exp, v5r-i) (something) has occurred; to have done (something); such a thing happened
私は彼に会ったことがある。
I have met him before.
(something) happens on occasions; there are times when

Can he be ill when he runs around like that?

あの本ほんは何度なんども読んだことがある。

I have read that book several times.

あの顔かおは以前いぜんにどこかで見たことがある。

I have seen that face somewhere before.

Sometimes you can't sleep at all.

Your new friends may laugh at some of the things you do.

あなたに相談そうだんしたいことがある。

I have something to talk over with you.

I fancy we've met before.

I have something to talk over with you, face to face.

May I have a talk with you?

「何かやることがあるの？」「特にとくにない」

"Do you have anything to do?" "Nothing in particular."