To commemorate means to honor and remember an important person, event, or achievement through a special ceremony, monument, or observance. When a town commemorates its founding, residents might hold a parade, unveil a statue, or organize special activities that celebrate how the town began. Museums commemorate historical events by creating exhibits that help people understand and remember what happened.

The word carries a sense of official or public recognition. You might remember your grandmother's birthday privately, but a city commemorates a beloved leader by naming a park after them or holding an annual event in their honor. Schools often commemorate achievements by displaying trophies or hanging plaques in hallways.

Stamps, coins, and monuments are common ways to commemorate. The Lincoln Memorial commemorates President Abraham Lincoln, and special commemorative stamps honor everything from famous scientists to historic moon landings. When we commemorate something, we're making sure future generations will know about it too. It's our way of saying “this matters” and ensuring that important moments and people aren't forgotten as time passes.