n. The act of separating, removing, or disconnecting one thing from another; a disjoining or disjunction: as, the separation of the soul from the body; the separation of the good from the bad.n. The operation of disuniting or decomposing substances; chemical analysis.n. The state of being separate; disunion; disconnection; separate existence.n. Specifically, a limited divorce, or divorce from bed and board without a dissolution of the marriage tie. This may be by common consent or by decree of a court; in the latter case it is called a judicial separation. See divorce.n. In music:n. A passing-note between two tones a third apart.n. In organ-building, a contrivance introduced into instruments where the great organ keyboard has a pneumatic action, enabling the player to use that keyboard without sounding the pipes belonging to it, even though its stops may be more or less drawn.n. A body of persons separated in fact or doctrine from the rest of the community; a body of separatists or nonconformists; specifically, in the seventeenth century, the Puritans collectively.n. In astrology, the condition when two significators have lately been in aspect and the aspect is just over.n. In horticulture, the method of propagating plants by means of naturally separable parts, as offsets, small bulbs that spring from a mother bulb, or detachable buds.