Attic (adj.) Look up Attic at
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.
attic (n.) Look up attic at
"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 by architects to "a low decorative facade above the main story of a building" (1690s in English) to convey a classical heritage where none exists, 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].