A collision is a violent coming together of two or more objects, such as cars, particles, or ideas, usually causing damage or change. It emphasizes impact and sudden contact.
It comes from Latin “collisio,” from “collidere,” meaning “to strike together,” from “com-” (together) and “laedere” (to strike or hurt). The word entered English through French in the 17th century.
Physicists use “collisions” not just for crashes but to unlock the secrets of matter—smashing particles together to see what they’re made of. In everyday speech, we even talk about “colliding interests” when people’s goals slam into each other.
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