The melting of ice, snow, or other congealed matter; the resolution of ice, or the like, into the state of a fluid; liquefaction by heat of anything congealed by frost

A warmth of weather sufficient to melt that which is frozen

To gradually melt, dissolve, or become fluid; to soften from frozen

“the ice thaws”

To become so warm as to melt ice and snow — said in reference to the weather, and used impersonally.

“It's beginning to thaw.”

To grow gentle or genial.

“Her anger has thawed.”