To dissent means to disagree with an official decision, popular opinion, or accepted belief, especially when you feel strongly that something is wrong or unjust. When you dissent, you express your disagreement openly, even when most people around you think otherwise, making your opposition known rather than keeping it to yourself.

A famous example comes from the Supreme Court. When most justices vote one way but one or more disagree, those who disagree write a dissenting opinion explaining why they think the majority got it wrong. These dissents sometimes become important years later when society's views change.

Dissent takes courage because it means standing apart from the group. If your class votes to have a pizza party but you think a field trip would be better, speaking up makes you a dissenter. In a more serious example, when a government passes a law some citizens believe is unfair, those citizens might dissent through peaceful protests or public statements.

A dissenter is someone who dissents, and dissenting describes the act itself. Dissent differs from simple disagreement because it usually involves some risk: the dissenter might face criticism, punishment, or isolation for speaking up. Yet throughout history, dissenters who challenged accepted ideas have helped society recognize important truths that the majority had missed.