| n. | 1. | (Bot.) One of various plants, supposed to have efficacy in driving away fleas. They belong, for the most part, to the genera Conyza, Erigeron, and Pulicaria. |
| Noun | 1. | fleabane - hairy perennial Eurasian herb with yellow daisylike flowers reputed to destroy or drive away fleas Synonyms: feabane mullet, Pulicaria dysenterica |
| 2. | fleabane - any of several North American plants of the genus Erigeron having daisylike flowers; formerly believed to repel fleas | |
| 3. | fleabane - common North American weed with linear leaves and small discoid heads of yellowish flowers; widely naturalized throughout temperate regions; sometimes placed in genus Erigeron |