Evolve means to change gradually over time, usually becoming more complex, sophisticated, or better adapted. When something evolves, it doesn't transform overnight. Instead, it develops step by step through a series of small changes.

In biology, evolution describes how living things change across many generations. Scientists like Charles Darwin studied how animals and plants evolve through a process called natural selection. Over millions of years, giraffes evolved longer necks that helped them reach leaves high in trees. Birds evolved from dinosaurs. Humans and chimpanzees evolved from a common ancestor that lived millions of years ago. These changes happened so slowly that no single generation could notice them, but over vast stretches of time, they resulted in new species.

The word also describes how ideas, technologies, or methods develop and improve. Video games have evolved from simple pixelated graphics to incredibly realistic virtual worlds. Your understanding of mathematics evolves as you move from basic addition to algebra. A friendship might evolve from classroom acquaintances to close companions. When someone's thinking evolves, they develop more nuanced or mature views as they learn and experience more.

Evolution often involves adapting to circumstances. Things that evolve respond to their environment or situation, finding ways to survive, function, or succeed.