'unaesthetic' definitions:

Definition of 'unaesthetic'

(from WordNet)
adjective
Violating aesthetic canons or requirements; deficient in tastefulness or beauty; "inaesthetic and quite unintellectual"; "peered through those inaesthetic spectacles" [syn: inaesthetic, unaesthetic] [ant: aesthetic, aesthetical, esthetic, esthetical]

Synonyms of 'unaesthetic'

From: Moby Thesaurus