| 1. | any cold-blooded vertebrate of the class Reptilia, comprising the turtles, snakes, lizards, crocodilians, amphisbaenians, tuatara, and various extinct members including the dinosaurs. |
| 2. | (loosely) any of various animals that crawl or creep. |
| 3. | a groveling, mean, or despicable person. |
| 4. | of or resembling a reptile; creeping or crawling. |
| 5. | groveling, mean, or despicable. |

A class of scaly vertebrates that usually reproduce by laying eggs. Lizards, snakes, turtles, and alligators are reptiles. Reptiles are cold-blooded animals.
Note: The dinosaurs were reptiles.