Noteworthy means deserving attention or worth noticing because it’s interesting, important, or unusual. When something is noteworthy, it stands out from the ordinary and merits being remembered or mentioned.

A scientist might make a noteworthy discovery that advances our understanding of the universe. A student could deliver a noteworthy performance in the school play that everyone talks about afterward. A building might be noteworthy for its unusual architecture, or a book might be noteworthy for tackling a subject in a fresh way.

Not everything that happens is noteworthy. Most days pass quietly with routine events, but occasionally something happens that makes people stop and take notice. If your teacher says your essay contained a noteworthy observation, she means you noticed something important that others might have missed.

The opposite of noteworthy is unremarkable or ordinary. When something is truly noteworthy, people remember it, discuss it, or write about it because it matters or stands out in some meaningful way.