- preceded by three others in a series; 4th
- designating any of the four equal parts of something
- designating the forward gear ratio of a motor vehicle next after third gear
Origin of fourthMiddle English feorthe, ferthe ; from Old English feortha: see four and amp; -th
- the one following the third
- any of the four equal parts of something;
- the fourth tone of an ascending diatonic scale, or a tone three degrees above or below any given tone in such a scale; subdominant
- the interval between two such tones, or a combination of them
- The ordinal number matching the number four in a series.
- One of four equal parts.
- Music a. A tone four degrees above or below a given tone in a diatonic scale.b. The interval between two such tones.c. The harmonic combination of these tones.d. The subdominant of a scale or key.
- The transmission gear or gear ratio used to produce forward speeds next higher to those of third in a motor vehicle.
- Fourth The Fourth of July; Independence Day. Used with the: went to a parade on the Fourth.
Origin of fourthMiddle English fourthe, from Old English fēortha; see kwetwer- in Indo-European roots.
- The ordinal form of the number four.
Abbreviations: 4th, 4th; (in names of monarchs and popes, and formal names in English) IV