「着る」 (kiru) means "to wear" or "to put on" clothes, specifically for the upper body (like shirts, jackets, dresses). For example, "シャツを着ます" (Shatsu o kimasu) means "I wear a shirt." It's a fundamental transitive verb for describing what you put on.

「着る」は、シャツや上着など、上半身の服を「身につける」ことを意味します。シャツを着ます。