Weirdness is the quality of being strange, unusual, or different from what people normally expect. When something has an element of weirdness to it, it doesn't quite fit ordinary patterns. A movie might have a certain weirdness if the characters behave in unexpected ways or the plot takes bizarre turns. A building might have architectural weirdness if it's shaped like a giant shoe or built upside down.

Weirdness isn't automatically good or bad. Sometimes weirdness makes things interesting and creative: many groundbreaking inventions seemed to have a touch of weirdness when they first appeared. Other times weirdness just means something feels off or uncomfortable, like the weirdness of walking into a silent room where everyone suddenly stops talking.

People often notice weirdness in social situations too. If your normally cheerful friend acts cold and distant, you might sense the weirdness of their behavior. If everyone at a party starts speaking in rhyme for no reason, you'd definitely notice the weirdness of that moment.

The word suggests something that makes you pause and think, “that's odd” or “that's not quite normal.” Scientists study the weirdness of quantum physics, where particles can be in two places at once. You might feel the weirdness of déjà vu, that strange sensation that you've experienced an exact moment before.