- (a.) Forming one of four equal parts into which anything may be divided.
- (n.) The interval of two tones and a semitone, embracing four diatonic degrees of the scale; the subdominant of any key.
- (n.) One of four equal parts into which one whole may be divided; the quotient of a unit divided by four; one coming next in order after the third.
- (a.) Next in order after the third; the ordinal of four.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). fourth. Retrieved September 20, 2026, from http://smartdefine.org/fourth/definitions/2009882 |
| Chicago | Webster's. 2011. "fourth" http://smartdefine.org/fourth/definitions/2009882 (accessed September 20, 2026). |
| Harvard | Webster's 2011, fourth, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/fourth/definitions/2009882>. |
| MLA | Webster's. "fourth" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/fourth/definitions/2009882> |