1) Attic 2) Garret 3) Loft 1) Attic 
structural space above ceiling and below rafters, often connecting adjacent occupancies and permitting fire to spread laterally, often unseen.
small room just under the roof
• (n.) An upper loft; a garret; the highest room in a building.
Cock'loft` (?; 115) noun [ Prop., a loft where cocks roost.] An upper loft; a garret; the highest room in a building. Dryden. Swift. 
[n] - a small loft or garret
noun a small loft or garret
a small loft or attic above the highest finished ceiling of a building. · a completely enclosed space between rafters and a suspended ceiling.