The Collaborative International Dictionary
Glengarry bonnet
Glengarry \Glen*gar"ry\, n., or Glengarry bonnet \Glen*gar"ry bon"net\ [Name of a valley in Scotland.] A kind of Highland Scotch cap for men, with straight sides and a hollow top sloping to the back, where it is parted and held together by ribbons or strings.
The long silk streamers of his Glengarry bonnet.
--L.
Hutton.