adjective
Separate; select.
(botany) Separated from others of the same kind.
(geology) Separate from a mass and collected together along lines of fraction.
verb
(transitive) To separate.
(transitive) In particular, to separate and organize by characteristics.
(intransitive, politics) To separate (races, sexes, or other groups, especially black and white people), especially by social policies that directly or indirectly keep them apart.
noun
An entity that is separated in some way from a reference group or entity.