lightening

The act or fact of becoming or making light or less heavy.

A becoming light; the break of day. See lightning, 1.

See lightning, 2.

A brightening up, as of the mind or spirit.

In metallurgy, the sudden brightening of the color of silver during cupellation when the metal reaches the point of greatest purity.

The process of changing to a lighter color.

Present participle of lighten.

The sensation caused by the descent of the uterus into the pelvic cavity before the onset of labour

The removal of cargo (especially crude oil) from a vessel in order to reduce its draft

changing to a lighter color