Lightening definition

(nautical) The removal of cargo (especially crude oil) from a vessel in order to reduce its draft.
noun
2
0
Present participle of lighten.
verb
1
0
(medicine) The sensation caused by the descent of the uterus into the pelvic cavity before the onset of labour.
noun
0
1
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Other Word Forms

Noun

Singular:
lightening
Plural:
lightenings