「学生」 (gakusei) means "student." This word refers to anyone who is currently studying at a school, university, or any educational institution. It's a general term for learners, regardless of their age or educational level.

「学(がく)生(せい)」は、学(がっ)校(こう)や大(だい)学(がく)などで勉(べん)強(きょう)している人(ひと)のことです。