twenty-first

[ twen-tee-furst, twuhn- ]

adjective
  1. next after the twentieth; being the ordinal number for 21.

  2. being one of 21 equal parts.

noun
  1. a twenty-first part, especially of one (1/21).

  2. the twenty-first member of a series.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use twenty-first in a sentence

  • Now this younger son—I believe that he is in his twenty-first year at present—has been something of a scapegrace.

    St. Martin's Summer | Rafael Sabatini
  • A person becomes of age at the beginning of the day before his twenty-first birthday.

  • He wears the same corduroy pants that Uncle Ben gave him on his twenty-first birthday.

    David Lannarck, Midget | George S. Harney
  • Of this lady he was deprived by her dying in child-birth in 1612, before attaining her twenty-first year.

    The Fortunes of Nigel | Sir Walter Scott
  • Viewed as written either in 1589, or in the reign of James, much of the twenty-first book is without meaning.

    Sir Walter Ralegh | William Stebbing