To dissolve gradually and become liquid by attracting and absorbing moisture from the air, as certain salts, acids, and alkalies.
- To melt away.
- To disappear as if by melting.
- Chemistry To dissolve and become liquid by absorbing moisture from the air.
- Botany To branch out into numerous subdivisions that lack a main axis, as the stem of an elm.
- Botany To become fluid or soft on maturing, as certain fungi.