cantilever UK /ˈkantɪliːvə/US /ˈkæntɪˌlivɚ/noun 3verb 1forms 3 noun3 •A beam anchored at one end and projecting into space, such as a long bracket projecting from a wall to support a balcony.Eventually Sir John Fowler's and Sir Benjamin Baker's continuous steel girder bridge on the cantilever principle was adopted. — 1941 •A beam anchored at one end and used as a lever within a microelectromechanical system.Magnetic resonance force microscopy employs an ultrasmall cantilever arm as a platform for specimens that are then moved in and out of proximity to a tiny magnet. — 2009 •A technique, similar to the spread eagle, in which the skater travels along a deep edge with knees bent and bends their back backwards, parallel to the ice. verb1 •To project (something) in the manner of or by means of a cantilever.Just above, the museums top floor seems to shift slightly, its corners cantilevering over the edge of the story below as if it is sliding off the top of the building. — 2007 formscantilevered · cantilevering · cantilevers