A monument is a structure built to help people remember an important person, event, or idea.

When you visit Washington, D.C., you'll see monuments honoring presidents like Lincoln and Jefferson. These are carefully designed spaces meant to make visitors pause and reflect on what these leaders meant to the country. The Vietnam Veterans Memorial is a monument that honors the soldiers who died in that war, with every name carved into black granite so visitors can find and remember individual people and connect personally with the loss, rather than thinking about war only as an abstract idea.

Monuments can mark achievements, tragedies, or turning points in history. Some are huge, like the Gateway Arch in St. Louis, while others might be simple plaques on buildings where significant events occurred. Ancient civilizations built monuments too: the Egyptian pyramids were monuments to pharaohs, and Stonehenge remains mysterious precisely because we're not entirely sure what it was meant to commemorate.

The word can also describe something impressively large or enduring. A monumental task is one requiring enormous effort. A monumental discovery changes everything that comes after it. Scientists might call someone's life work a monument to human curiosity.