(US) To heat something until it reaches its boiling point. / (figuratively) To bring (a debate, etc.) to a peak of activity or emotion.

(Britain) A hard sweet, made by boiling sugar, which gradually dissolves when sucked.

Alternative form of tar boil

(roofing) A small bubble or blister in the flood coat of an aggregate-surfaced built-up membrane

(intransitive) To boil to such an extent as to overflow its container. / (idiomatic, of anger, etc.) To reach the point where aggressive action is taken.

(transitive) to remove by boiling / (intransitive) to be removed by boiling

An order that everyone in an area boil or otherwise sanitize water before using it for drinking or for use with food.

plural of boil order

(figuratively) To undertake an overwhelmingly difficult task or approach to a problem.

(geology) An eruption of water through a bed of sand due, for instance, to seismic activity, or to differences in water pressure on two sides of a levee which causes water to penetrate beneath the levee.