- The cardinal number occurring after twelve and before fourteen, represented in Roman numerals as XIII and in Arabic numerals as 13.
- There are thirteen cards of each of the four suits in a deck of playing cards.
- 1661, John Fell (bishop), The Life of the most learned, reverend and pious Dr. H. Hammond ↗
- During the whole time of his abode in the university he generally spent thirteen hours of the day in study; by which assiduity besides an exact dispatch of the whole course of philosophy, he read over in a manner all classic authors that are extant […]
- baker’s dozen
- long dozen
- throtteen (dialect)
- Ordinal: thirteenth