When something is seen, it has been noticed or observed with your eyes. If you've seen a movie, you watched it. If you've seen your friend at school, you spotted them in the hallway or classroom.

The word often implies observation that goes beyond a quick glance. When you say “I've seen what happens when people don't study,” you mean you've witnessed or experienced the consequences firsthand. When a doctor says she's seen hundreds of cases of the flu, she means she's observed and treated that many patients.

Seen is also used to mean understood or recognized in a deeper way. When someone says “I feel seen,” they mean another person truly understood them, looked beyond surface appearances, and recognized who they really are. A teacher who really sees her students notices their work, efforts, struggles, and growth.

You might hear people say they've seen better days (meaning something looks worn out), or they've seen it all (meaning nothing surprises them anymore). When something has seen a lot of use, like a well-loved baseball glove, it means it's been used extensively over time.