Strangest

adjective

1. Not normal; odd, unusual, surprising, out of the ordinary.

   "He thought it strange that his girlfriend wore shorts in the winter."

2. Unfamiliar, not yet part of one's experience.

   "I moved to a strange town when I was ten."

3. Having the quantum mechanical property of strangeness.
4. Of an attractor: having a fractal structure.
5. Belonging to another country; foreign.