n. In golf, a handicap allowance equivalent to one stroke at every third hole; an allowance of six strokes in eighteen holes.Next after the second: an ordinal numeral.Being one of three equal subdivisions: as, the third part of anything.n. One of three equal parts into which a unit or total may be divided.n. plural In English and American law, the third part of the husband's personal property, which goes to the widow absolutely in the case of his dying intestate leaving a child or descendant, given (with various qualifications) by the common law and by modern statutes.n. The sixtieth of a second of time or arc.n. In music: A tone on the third degree above or below a given tone; the next tone but one in a diatonic series.n. The interval between any tone and a tone on the third degree above or below it.n. The harmonic combination of two tones at the interval thus defined.n. In a scale, the third tone from the bottom; the mediant: solmizated mi.n. In base-ball, same as third base. See baseball, 1.To work at or treat a third time: as, to third turnips (that is, to hoe them a third time).n. Thread.