impersonal. it freezes: the local temperature of the atmosphere is such that water becomes ice. †Also quasi-personal with a subject (frost, etc.).

To become solid and rigid by freezing; to freeze; to become solid by cooling.

transitive and intransitive. To stiffen as with cold, to congeal.

intransitive. To freeze.

intransitive. To become ice, to freeze, congeal.

intransitive. Canadian. Of a lake or river: to freeze. Also transitive (in passive). Cf. sense 16. Now rare.

intransitive. In later use North American. Of water, a stretch of water, etc.: to freeze; to begin to freeze; (of ice) to form a solid layer on a…