Referee blows whistle.
Meaning: This means that the person who is responsible for making sure the rules of the game are followed is using a whistle to make a loud sound. It's like saying, The person in charge of enforcing the rules is using a whistle to signal something.
Choice of Words: Referee is a person who makes sure the rules of a game or sport are followed. Blows is a verb that means to force air out of the mouth to make a sound. Whistle is a small device that makes a loud sound when air is forced through it.
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