the GNU version of the Collaborative International Dictionary of English
n. A low, flat mass of floating ice.
The Century Dictionary and Cyclopedia
n. Ice formed by the freezing of the surface-water of the polar oceans, and subsequently broken up by the action of the winds and the waves into tabular masses of greater or less size; also, a piece of such ice.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a flat mass of ice (smaller than an ice field) floating at sea
Word Usage
"The fate of three men afloat on a floe is too horrible to think about."