stranger (Noun) — Anyone who does not belong in the environment in which they are found.
stranger (Noun) — An individual that one is not acquainted with.
stranger (Adjective) — Being definitely out of the ordinary and unexpected; slightly odd or even a bit weird. ex. "a strange exaltation that was indefinable" ex. "what a strange sense of humour she has"
stranger (Adjective) — Not known before. ex. "used many strange words" ex. "saw many strange faces in the crowd"
stranger (Adjective) — Relating to or originating in or characteristic of another place or part of the world. ex. "strange nations"
stranger (Adjective) — (physics) having a strangeness quantum number.