(a special occasion or period of) public enjoyment and entertainment involving wearing unusual clothes, dancing, and eating and drinking, usually held in the streets of a city

a Caribbean carnival 加勒比海狂欢节

There's a real carnival atmosphere in the streets. 街上真是一派狂欢节的气氛。

a place of outside entertainment where there are machines for riding on and games that can be played for prizes

a public event, often held outside, where you can take part in competitions and buy small things and food, often organized to collect money for a particular purpose