From The Collaborative International Dictionary of English v.0.48 [gcide]:
Unused \Un*used"\, a.
1. Not used; as, an unused book; an unused apartment.
[1913 Webster]
2. Not habituated; unaccustomed.
[1913 Webster]
Unused to bend, impatient of control. --Thomson.
[1913 Webster]
From WordNet (r) 3.0 (2006) [wn]:
unused
adj 1: not yet used or soiled; "a fresh shirt"; "a fresh sheet
of paper"; "an unused envelope" [syn: fresh, unused]
2: not yet put into use; "we bought an unused car for a change"
3: not in active use; "the machinery sat idle during the
strike"; "idle hands" [syn: idle, unused]
4: infrequently exposed to; "feet unused to shoes"