From WordNet (r) 3.0 (2006) [wn]:
residential
adj 1: used or designed for residence or limited to residences;
"a residential hotel"; "a residential quarter"; "a
residential college"; "residential zoning" [ant:
nonresidential]
2: of or relating to or connected with residence; "a residential
requirement for the doctorate"
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Residential \Res`i*den""tial\ (-d?n"shal), a.
1. Of or pertaining to a residence or residents; as,
residential trade; a residential part of town.
[1913 Webster]
2. Residing; residentiary. [R.]
[1913 Webster]