the musical interval between one note and another four notes away from it
one of four equal parts
"a quarter of a pound"
- one fourth - one quarter - fourth part - twenty five percent
following the third position
number four in a countable series
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"
in the fourth place
"fourthly, you must pay the rent on the first of the month"