Laughter spreads like wildfire through a crowd.
Meaning: This sentence is saying that laughter can spread quickly through a group of people, just like a wildfire spreads through a forest.
Choice of Words: Spread means to move or distribute something over a wide area. Wildfire is a large, uncontrolled fire that spreads quickly through a forest or other wild area. Crowd is a large group of people gathered together in one place.
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Related Expressions