n. 1. The cardinal number equal to 18 + 1. 2. The 19th in a set or sequence. [Middle English nintene, from Old English nigontēne; see new in the Appendix of Indo-European roots.] nine·teen adj. & pron. |
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.