the GNU version of the Collaborative International Dictionary of English
n. See gyrfalcon.
The Century Dictionary and Cyclopedia
n. A large falcon of arctic Europe, Falco gyrfalco, or one of other kinds of boreal falcons forming the subgenus Hierofalco, of large size, very robust organization, and highly raptorial nature.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. large and rare Arctic falcon having white and dark color phases
Word Usage
"[Footnote 4: A gerfalcon is a large falcon of Northern Europe.] "Oft to his frozen lair"