Real Dictionary

attic
countable noun: An attic is a room at the top of a house just below the roof.

Attic in American English
a low wall or story above the cornice of a classical facade
of Attica
adjective: of, pertaining to, or characteristic of Greece or of Athens
noun: the dialect of ancient Attica that became the standard language of Classical Greek literature in the 5th and 4th centuries b.c.
noun: the part of a building, esp. of a house, directly under a roof; garret

attic in British English
adjective: of or relating to Attica, its inhabitants, or the dialect of Greek spoken there, esp in classical times
noun: a space or room within the roof of a house
noun: the dialect of Ancient Greek spoken and written in Athens: the chief literary dialect of classical Greek