When a group makes a unanimous decision, every single person agrees, with no exceptions. If your class votes unanimously to have a pizza party, that means every student voted yes. If a jury reaches a unanimous verdict, all twelve jurors agree on whether the defendant is guilty or innocent.

You'll often hear it in formal situations like court verdicts, committee votes, or official elections, but it applies anywhere people make decisions together.

Unanimous decisions can be surprisingly powerful. When everyone agrees, there's no debate afterward, no lingering disagreement. But reaching unanimity can be difficult. In a group of thirty students choosing between a field trip to the science museum or the zoo, getting everyone to agree on one option might be nearly impossible. That's why most decisions only require a majority (more than half) rather than unanimity.

Sometimes you'll see the related word unanimously, as in “The team unanimously elected Sarah as captain.” That means not a single person voted for anyone else.