Definition of Fourth

1. Noun. Following the third position; number four in a countable series.

Generic synonyms: Rank

2. Adjective. 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"
Exact synonyms: 4th, Quaternary
Similar to: Ordinal

3. Adverb. In the fourth place. "Fourthly, you must pay the rent on the first of the month"
Exact synonyms: Fourthly

4. Noun. One of four equal parts. "A quarter of a pound"

5. Noun. The musical interval between one note and another four notes away from it.
Generic synonyms: Interval, Musical Interval

Definition of Fourth

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

2. 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.

Definition of Fourth

1. Noun. The Fourth of July. ¹

2. Adjective. The ordinal form of the number four. ¹

3. Noun. (context: not used in the plural) The person or thing in the fourth position. ¹

4. Noun. A quarter, one of four equal parts of a whole. ¹

5. Noun. (context: not used in the plural) The fourth gear of an engine. ¹

6. Noun. (music) A musical interval which spans four degrees of the diatonic scale, for example C to F (C D E F). ¹

¹ Source:

Definition of Fourth

1. one of four equal parts [n -S]

Fourth Pictures

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Lexicographical Neighbors of Fourth

fourteen hundred
fourth (current term)
fourth-party logistics
fourth cousin
fourth cranial nerve
fourth deck
fourth dimension
fourth disease
fourth down
fourth estate
fourth finger
fourth freedom rights

Literary usage of Fourth

Below you will find example usage of this term as found in modern and/or classical literature:

1. Readers' Guide to Periodical Literature by H.W. Wilson Company (1909)
"fourth dimension. 1500 prize for a simple explanation of ... fourth dimension simply explained. E: H. Third honorable mention essay In the fourth dimension ..."

2. Publishers Weekly by Publishers' Board of Trade (U.S.), Book Trade Association of Philadelphia, American Book Trade Union, Am. Book Trade Association, R.R. Bowker Company (1878)
"Third and fourth, 20 с Mem. Soule Л: Wheeler's First Lessons in Reading, 35 с Le. ... fourth and Fifth combined, $1.20 Sker, "Webster's Elementary Reader, ..."

3. Science by American Association for the Advancement of Science (1899)
"So far as their characteristic features go, the spectra are quite dissimilar, the pronounced carbon absorption bands of the fourth type having no ..."

4. Hamlet by William Shakespeare (1905)
"The fourth Act ends with the death of Ophelia. The Fifth begins with the day of her burial, and two or three days might be supposed to intervene. ..."

5. The History of the Decline and Fall of the Roman Empire by Edward Gibbon, William Smith (1862)
"At his voice two crusades, the fourth and the fifth, were undertaken ; but, except a king of Hungary, the princes of the second order were at the head of ..."

6. The Papacy and the Levant (1204-1571). by Kenneth M. Setton (1984)
"The sources for the Crusades remain quite abundant, however, especially those for the highly controverted fourth Crusade. Few movements have excited greater ..."

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