1. unusual or surprising; difficult to understand or explain
2. not known, seen, or experienced before; unfamiliar

Examples

• It’s strange that he didn’t call back.
• She heard a strange noise coming from the attic.
• The new city felt strange at first.
• There’s something strange about his behavior today.
• I woke up in a strange room and couldn’t remember how I got there.
• The strange customs of the remote village fascinated the anthropologist.
• It feels strange to be back home after so many years away.