a. | 1. | Next in order after the third; the ordinal of four. | |||
2. | Forming one of four equal parts into which anything may be divided. | ||||
n. | 1. | One of four equal parts into which one whole may be divided; the quotient of a unit divided by four. | |||
2. | (Mus.) The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key. | ||||
3. | One coming next in order after the third.
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Noun | 1. | fourth - following the third position; number four in a countable series |
2. | fourth - one of four equal parts; "a quarter of a pound" | |
3. | fourth - the musical interval between one note and another four notes away from it | |
Adj. | 1. | fourth - 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 |
Adv. | 1. | fourth - in the fourth place; "fourthly, you must pay the rent on the first of the month" Synonyms: fourthly |