Main entry: fourth
Definition: the musical interval between one note and another four notes away from it
Main entry: twenty-five percent, one-fourth, one-quarter, quarter, quartern, fourth, fourth part
Definition: one of four equal parts
Usage: a quarter of a pound
Main entry: fourth
Definition: following the third position; number four in a countable series
Main entry: 4th, fourth, quaternary
Definition: coming next after the third and just before the fifth in position or time or degree or magnitude
Usage: the quaternary period of geologic time extends from the end of the tertiary period to the present
Definition: in the fourth place
Usage: fourthly, you must pay the rent on the first of the month