fourth

nouns

following the third position; number four in a countable series
fourth
is a type of (narrower)
relative status
"his salary was determined by his rank and seniority"
rank
one of four equal parts
"a quarter of a pound"
fourth, fourth part, one-fourth, one-quarter, quarter, quartern, twenty-five percent
the musical interval between one note and another four notes away from it
fourth
is a type of (narrower)
the difference in pitch between two notes
interval, musical interval

adjectives

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"
4th, fourth, quaternary

adverbs

in the fourth place
"fourthly, you must pay the rent on the first of the month"
fourth, fourthly