fourth

Noun · Adjective · Adverb

Synonyms: one-fourth one-quarter quarter fourth part twenty-five percent quartern 4th quaternary fourthly

WordNet 3.0

Noun (3)

following the third position; number four in a countable series
one of four equal parts“a quarter of a pound”Synonyms: one-fourth one-quarter quarter fourth part twenty-five percent quartern
the musical interval between one note and another four notes away from it

Adjective (1)

coming next after the third and just before the fifth in position or time or degree or magnitude“the quaternary period of geologic time extends from the end of the tertiary period to the present”Synonyms: 4th quaternary

Adverb (1)

in the fourth place“fourthly, you must pay the rent on the first of the month”Synonyms: fourthly

Webster's Dictionary (GCIDE)

Fourth \Fourth\, a. [OE. fourthe, ferthe, feorthe, AS. fe['o]r[eth]a, fr. fe['o]wer four.]

1.Next in order after the third; the ordinal of four. [1913 Webster]

2.Forming one of four equal parts into which anything may be divided. [1913 Webster]

Fourth \Fourth\, n.

1.One of four equal parts into which one whole may be divided; the quotient of a unit divided by four. [1913 Webster]

2.(Mus.) The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key. [1913 Webster]

3.One coming next in order after the third. [1913 Webster]

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. [1913 Webster]