ENGLISH
REFERENCE

nineteenth

num. · n.
US //ˈnaɪnˈtinθ// UK //nˈaɪntiːnθ// nine·teenth
  1. 1 position 19 (num.)
    A2 Elementary

    coming after the eighteenth and before the twentieth.

    the ordinal form of the number nineteen, indicating a position in a sequence.

    Example

    Her nineteenth birthday is next Tuesday, so we are planning a party.

    Example

    The nineteenth century was a period of unprecedented industrial growth and social transformation across Europe.
    • 19th
  2. 2 a fraction (n.)
    B2 Upper Intermediate Math

    one of nineteen equal parts of a whole.

    one of nineteen equal parts into which a whole is or may be divided.

    Example

    If you divide the cake into nineteen pieces, each piece is one nineteenth.

    Example

    The surveyor calculated that a nineteenth of the total land area would be lost to the rising water levels.

Origin

From nineteen + -th.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Last updated June 20, 2026