Definition of twentieth

• a. - Next in order after the nineteenth; tenth after the tenth; coming after nineteen others; -- the ordinal of twenty.
• a. - Consisting, or being, one of twenty equal parts into which anything is divided.
• n. - The next in order after the nineteen; one coming after nineteen others.
• n. - The quotient of a unit divided by twenty; one of twenty equal parts of one whole.