Definify.com

Webster 1913 Edition

Adj.

[OE.

fourthe

ferthe

feorthe

, AS.

feórða

, fr.

feówer

four.]

Next in order after the third; the ordinal of four.

Forming one of four equal parts into which anything may be divided.

Noun.

One of four equal parts into which one whole may be divided; the quotient of a unit divided by four.

(Mus.)

The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key.

One coming next in order after the third.

The Fourth

specifically, in the United States, the fourth day of July, the anniversary of the declaration of American independence;

as, to celebrate

the Fourth

Adj.

The ordinal of four; the next after the third.

Noun.

In music, an interval composed of two tones and a semitone. Three full tones compose a triton, or fourth redundant.