an act or instance of separating or the state of being separated.

a place, line, or point of parting.

a gap, hole, rent, or the like.

something that separates or divides.

Law .

cessation of conjugal cohabitation, as by mutual consent.

judicial separation.

Aerospace . the time or act of releasing a burned-out stage of a rocket or missile from the remainder.

Photography . separation negative.

noun

togetherness

noun

break , dedomiciling , departure , detachment , disconnection , disengagement , disjunction , disrelation , dissociation , dissolution , disunion , division , divorce , divorcement , embarkation , estrangement , farewell , gap , leave-taking * , parting , parting of the ways , partition , pffft , rift , rupture , segregation , severance , split , split-up , disjuncture , disseverance , disseverment , uncoupling , differentiation , discrimination , insulation , sequestration , interspace , interstice , interval , analysis , apartheid , breakup , decomposition , deglutination , demarcation , discharge , disintegration , distance , fracture , gulf , isolation , schism , wall