stranger - definition and synonyms

noun [countable] 

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  1. 1
    someone who you do not know
    a complete/perfect/total stranger (=used for emphasizing that you do not know the person at all):

    I didn’t want to share a room with a complete stranger.

  2. 2
    someone who does not know a place well
    stranger to:

    Strangers to the area tend to expect the landscape to be completely flat.