eighty-fourth

From eighty-four +‎ -th (ordinal suffix).

• (UK) IPA^(key): /ˌeɪti ˈfɔːθ/
• (US) IPA^(key): /ˌeɪti ˈfɔɹθ/

eighty-fourth

1. The ordinal form of the number eighty-four, describing a person or thing in position number 84 of a sequence.

   The answer appears on the eighty-fourth page of the book.

   She finished eighty-fourth in the race.

English ordinal numbers may function as either an adjective or as a noun, and almost never appear in the plural.

• 84th, 84^th

eighty-fourth (plural eighty-fourths)

1. One of eighty-four equal parts of a whole.

   An eighty-fourth of 1680 is 20.