WordReference Random House Learner's Dictionary of American English © 2026thir•teen /ˈθɜrˈtin/USA pronunciation
n. [countable]
- a cardinal number, 10 plus 3.
- a symbol for this number, as 13 or XIII.
- a set of this many persons or things.
adj. [before a noun]
- amounting to 13 in number.
thir•teenth, adj.
WordReference Random House Unabridged Dictionary of American English © 2026thir•teen
(thûr′tēn′),USA pronunciation n.
- a cardinal number, 10 plus 3.
- a symbol for this number, as 13 or XIII.
- a set of this many persons or things.
adj.
- amounting to 13 in number.
- bef. 900; late Middle English thirttene, variant of Middle English thrittene, Old English thrēotēne; cognate with Dutch dertien, German dreizehn, Old Norse threttān. See three, -teen
Collins Concise English Dictionary © HarperCollins Publishers::
thirteen /ˈθɜːˈtiːn/ n - the cardinal number that is the sum of ten and three and is a prime number See also number
- a numeral, 13, XIII, etc, representing this number
- something represented by, representing, or consisting of 13 units
determiner - amounting to thirteen
- (as pronoun): thirteen of them fell
Etymology: Old English threotēne; see three, -teen
'thirteen' also found in these entries (note: many are not synonyms or translations):