1590s, "pertaining to Attica," from Latin Atticus, from Greek Attikos "Athenian, of Attica," the region around Athens (see Attica). Attested from 1560s as an architectural term for a type of column base.
"top story under the roof of a house," 1855, shortened from attic storey (1724). The term Attic order in classical architecture meant a small, square decorative column of the type often used in a low story above a building's main facade, a feature associated with the region around Athens (see Attic). The word then was applied to "a low decorative facade above the main story of a building" (1690s in English), and it came to mean the space enclosed by such a structure. The modern use is via French. attique. "An attic is upright, a garret is in a sloping roof" [Weekley].
attic at·tic (āt'ĭk)
n.
The upper portion of the tympanic cavity above the tympanic membrane that contains the head of the malleus and the body of the incus. Also called epitympanum.