thirteen
n.n. the number that comes after twelve and before fourteen.
n. the cardinal number equivalent to the sum of twelve and one.
There are thirteen players on the team today.
The baker added an extra roll to the bag, giving the customer thirteen instead of twelve.
Superstitious beliefs regarding the number thirteen often lead to the omission of a thirteenth floor in high-rise buildings, skipping directly from twelve to fourteen.
From Middle English thirttene, variant (through metathesis) of thrittene, from Old English þrēotīene, from Proto-Germanic þritehun, compound of þrīz (“three”) + *tehun (“teen”). Cognate with West Frisian trettjin, Dutch dertien, German dreizehn, Danish tretten. Equivalent to three + -teen.
Functions as both a noun and a determiner depending on whether it stands alone or modifies a noun.