lady's slipper noun orlady-slipperalsoladies' slipper\|lādē(z)| ̷ ̷ ̷ ̷\ 1.: any of several No. American temperate-zone orchids especially of the genus Cypripedium having flowers whose shape suggests a slipper 2.: garden balsam 3.dialect England: bird's-foot trefoil 1a 4.usually plural: garden columbine