Fourth

Pronunciation

• RP IPA: /fɔːθ/
• GenAm IPA: /foəɹθ/, /fɔːɹθ/
• Rhymes: -ɔː(ɹ)θ
• Homophones: forth

Full definition of fourth

Adjective

1. The ordinal form of the number four.

Usage notes

Abbreviations: 4th, 4

th

in names of monarchs and popes, and formal names in English IV

Noun

1. (not used in the plural) The person or thing in the fourth position.
2. A quarter, one of four equal parts of a whole.
3. (not used in the plural) The fourth gear of an engine.
4. (music) A musical interval which spans four degrees of the diatonic scale, for example C to F (C D E F).

Synonyms

• (quarter) fourth part, quarter, ¼
• (gear) fourth gear

Derived terms