Webster's Revised Unabridged Dictionary · 1913

Garret

Garret , noun

[Old English garite, garette, watchtower, place of lookout, Old French garite, also meaning, a place of refuge, French guérite a place of refuge, donjon, sentinel box, from Old French garir to preserve, save, defend, French guérir to cure; of German origin; compare Old High German werian to protect, defend, hinder, German wehren, akin to Gothic warjan to hinder, and akin to English weir, or perhaps to wary. See Weir, and compare Guerite.]

1.
A turret; a watchtower. [Obsolete]
He saw men go up and down on the garrets of the gates and walls. — Ld. Berners
2.
That part of a house which is on the upper floor, immediately under or within the roof; an attic.
The tottering garrets which overhung the streets of Rome. — Macaulay