aes·thet·ic or es·thet·ic 
(ĕs-thĕtĭk)
(ĕs-thĕtĭk)adj.
1. Relating to the philosophy or theories of aesthetics.
2.
a. Of or concerning the appreciation of beauty or good taste: aesthetic judgment; the aesthetic appeal of the exhibit.
b. Attractive or appealing: the more aesthetic features of the building.
3. Characterized by a heightened sensitivity to beauty: the poet and his aesthetic friends.
4. Being or relating to a work of art; artistic: The play was an aesthetic success.
5. Informal Conforming to accepted notions of good taste.
6. often Aesthetic Of or characteristic of aestheticism in the arts.
n.
1. A guiding principle in matters of artistic beauty and taste; artistic sensibility: "a generous Age of Aquarius aesthetic that said that everything was art" (William Wilson).
2. An underlying principle, a set of principles, or a view often manifested by outward appearances or style of behavior: "What troubled him was the squalor of [the colonel's] aesthetic" (Lewis H. Lapham).
[German ästhetisch, from New Latin aesthēticus, from Greek aisthētikos, of sense perception, from aisthēta, perceptible things, from aisthanesthai, to perceive; see au- in the Appendix of Indo-European roots.]
aes·theti·cal·ly adv.