| 1. | a cardinal number, ten plus nine. |
| 2. | a symbol for this number, as 19 or XIX. |
| 3. | a set of this many persons or things. |
| 4. | amounting to nineteen in number. |
| 5. | talk nineteen to the dozen, to talk very rapidly or vehemently: Whenever I'm excited I talk nineteen to the dozen. |