1. become covered with a layer of ice; of a surface such as a window; - Example: "When the wings iced up, the pilot was forced to land his plane" [syn: ice up, frost over, ice over]
WordNet (r) 3.0 (2006):
frost over
v 1: become covered with a layer of ice; of a surface such as a
window; "When the wings iced up, the pilot was forced to
land his plane" [syn: ice up, frost over, ice over]