fourth
adjective
1. coming next after the third and just before the fifth in position or time or degree or magnitude
Similar word(s): ordinal, quaternary
adverb
1. in the fourth place
- fourthly, you must pay the rent on the first of the month
Similar word(s): fourthly
noun
1. following the third position; number four in a countable series
Definition categories: link, rank
2. one of four equal parts
Similar word(s): quarter, quartern
Definition categories: quantity
3. the musical interval between one note and another four notes away from it
Definition categories: communication, interval