A large black, gray, or white falcon (Falco rusticolus) that breeds in Arctic and subarctic regions and sometimes migrates to northern North America and Eurasia. It is highly valued in falconry.
A large, fierce, strong falcon (Falco rusticolus) of the arctic regions.
Origin of gyrfalcon
Middle English girfaucoun from Old French girfaut, gerfaucon Old High German gīr vulture Old French faucon falcon falcon