1. (Science: botany) a plant having twigs suitable for making brooms to sweep with when bound together; especially, the Cytisus scoparius of western Europe, which is a low shrub with long, straight, green, angular branches, mintue leaves, and large yellow flowers. No gypsy cowered o'er fires of furze and broom. (Wordsworth)
2. An implement for sweeping floors, etc, commonly made of the panicles or tops of broom corn, bound together or attached to a long wooden handle; so called because originally made of the twigs of the broom. Butchers broom, a plant (Ruscus aculeatus) of the smilax family, used by butchers for brooms to sweep their blocks; called also knee holly. See cladophyll. Dyer's broom, a species of mignonette (reseda luteola), used for dyeing yellow; dyer's weed; dyer's rocket. Spanish broom. See spanish.