| 1. |
(satellite 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" |
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Synonyms: 4th, quaternary |
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| 2. |
(noun) the musical interval between one note and another four notes away from it |
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Related Words: interval, musical interval |
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| 3. |
(noun) following the third position; number four in a countable series |
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Related Words: rank |
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| 4. |
(adverb) in the fourth place; "fourthly, you must pay the rent on the first of the month" |
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Synonyms: fourthly |
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| 5. |
(noun) one of four equal parts; "a quarter of a pound" |
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Synonyms: fourth part, one-fourth, quarter, quartern, twenty-five percent |
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Related Words: common fraction, simple fraction |
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