Source : Webster's Revised Unabridged Dictionary (1913)

Aloofness \A*loof"ness\, n.
   State of being aloof. --Rogers (1642).

         The . . . aloofness of his dim forest life. --Thoreau.

Source : WordNet®

aloofness
     n 1: indifference by personal withdrawal; "emotional distance"
          [syn: {distance}]
     2: a disposition to be distant and unsympathetic in manner
        [syn: {remoteness}, {standoffishness}, {withdrawnness}]