noun, plural -zies, verb, -zied, -zy⋅ing.| 1. | extreme mental agitation; wild excitement or derangement. |
| 2. | a fit or spell of violent mental excitement; a paroxysm characteristic of or resulting from a mania: He is subject to these frenzies several times a year. |
| 3. | to drive to frenzy; make frantic: She was frenzied by fear when she smelled the smoke. |