Describes when water turns to solid ice, typically uses with bodies of water. Every winter, the entire pond would freeze over, and we'd ice skate on it.
Pro Tip 2/3
Weather Dependent
Implies a drop in temperature is enough for freezing, common in weather discussions. Check the forecast; the stream might freeze over tonight.
Pro Tip 3/3
Not Instantaneous
Suggests a process over time, not something that happens quickly. As winter progressed, the fountain slowly started to freeze over.