twentieth Meaning, Definition & Usage

  1. noun position 20 in a countable series of things
  2. adjective satellite coming next after the nineteenth in position
    20th.

WordNet

Twen"ti*eth adjective
Etymology
From Twenty; cf. AS. twentigoa. See Twenty.
Definitions
  1. Next in order after the nineteenth; tenth after the tenth; coming after nineteen others; -- the ordinal of twenty.
  2. Consisting, or being, one of twenty equal parts into which anything is divided.
Twen"ti*eth noun
Definitions
  1. The next in order after the nineteen; one coming after nineteen others.
  2. The quotient of a unit divided by twenty; one of twenty equal parts of one whole.

Webster 1913