To give in means to stop resisting and agree to something you initially opposed. When your friend keeps begging to play their favorite game and you finally say “okay, fine,” you've given in. When a parent says no to dessert before dinner but eventually allows it after persistent pleading, they've given in.

Giving in isn't always about weakness. Sometimes you give in because you realize the other person has a good point, or because continuing to argue isn't worth it. If your soccer team is debating which drill to practice and you give in to the majority's choice, that's often just being reasonable and cooperative.

But giving in can also mean surrendering when you probably shouldn't. If a bully demands your lunch money and you hand it over, you've given in to pressure. If you know the right answer but give in and change it because everyone else disagrees, you might regret it later.

The phrase appears in other contexts too. A weakened bridge might give in under too much weight, meaning it collapses. In this sense, giving in means physically breaking or failing under pressure, just like it can mean emotionally or mentally stopping your resistance.