- preceded by twelve others in a series; 13th
- designating any of the thirteen equal parts of something
Origin of thirteenthMiddle English thirtenth: see thirteen and amp; -th
- the one following the twelfth
- any of the thirteen equal parts of something;
in the thirteenth place, rank, group, etc.
- The ordinal number matching the number 13 in a series.
- One of 13 equal parts.
- The ordinal form of the number thirteen.
- 13th, 13th; (in names of monarchs and popes) XIII