Definitions of willow:

• noun:   a textile machine having a system of revolving spikes for opening and cleaning raw textile fibers
• noun:   any of numerous deciduous trees and shrubs of the genus Salix
• name:  A female given name (rare: 1 in 100000 females; popularity rank in the U.S.: #4003)
• name:  A surname (very rare: popularity rank in the U.S.: #44871)