n. an open stretch or patch in the frozen surface of a waterway.
- 1953  Six inches from an open, dangerous glade we just missed a huge ballacater, then catapulted onto the risky ice.
- 1959  (Caption) The triangular patch at the upper right and the black patch at left center show open stretches of water--the "glades" which are avoided as danger spots by all winter river travellers.