'Mirth' in the Bible

I said in my heart, Come now, I will prove thee with mirth; therefore enjoy pleasure: and, behold, this also was vanity.

I said of laughter, It is mad; and of mirth, What doeth it?

The heart of the wise is in the house of mourning; but the heart of fools is in the house of mirth.

Then I commended mirth, because a man hath no better thing under the sun, than to eat, and to drink, and to be joyful: for that shall abide with him in his labor all the days of his life which God hath given him under the sun.