ice dam

Noun

 * 1)  an obstruction to the flow of a river caused by the flow of a glacier across its course
 * 2)   an obstruction to the flow of a river caused by the concatenation of surface ice into a ridge that rises above and sinks below the surface causing a blockage, occurring frequently during spring breakup season
 * 3)   a mass of ice formed at the transition from a warm to a cold roof surface, frequently formed by refreezing meltwater at the overhang of a steep roof, causing ice and water to back up under roofing materials.
 * 4)   A plastic protection membrane applied to rooves to prevent ice buildup from backing water through roof sheeting
 * 1)   a mass of ice formed at the transition from a warm to a cold roof surface, frequently formed by refreezing meltwater at the overhang of a steep roof, causing ice and water to back up under roofing materials.
 * 2)   A plastic protection membrane applied to rooves to prevent ice buildup from backing water through roof sheeting

Translations

 * French:
 * Spanish: presa de hielo, barrera de hielo