n. The act of elongating or lengthening; the state of being elongated or lengthened.n. Extension; continuation.n. Distance; space which separates one thing from another.n. A removing to a distance; removal; recession.n. In astronomy: The angular distance of a planet from the sun, as it appears to the eye of a spectator on the earth; apparent departure of a planet from the sun in its orbit: as, the elongation of Venus or Mercury.n. The angular distance of a satellite from its primary.n. In surgery: A partial dislocation, occasioned by the stretching or lengthening of the ligaments.n. The extension of a part beyond its natural dimensions.