noun, verb, -tled, -tling.| 1. | any plant of the genus Urtica, covered with stinging hairs. Compare nettle family. |
| 2. | any of various allied or similar plants. |
| 3. | to irritate, annoy, or provoke. |
| 4. | to sting as a nettle does. |
| 5. | grasp the nettle, Australian. to undertake or tackle an unpleasant task. |
