The Collaborative International Dictionary of English v.0.48:

Inhospitality \In*hos`pi*tal"i*ty\, n. [L. inhospitalitas: cf.
   F. inhospitalit['e]. See In- not, and Hospitality.]
   The quality or state of being inhospitable; inhospitableness;
   lack of hospitality. --Bp. Hall.
   [1913 Webster]

WordNet (r) 3.0 (2006):

inhospitality
    n 1: unkind and inconsiderate welcome; "he was taken aback by
         such inhospitality" [ant: cordial reception,
         hospitality]