cantilever n
a a beam, girder, or structural framework that is fixed at one end only
b (as modifier)
a cantilever wing
2 a wing or tailplane of an aircraft that has no external bracing or support
3 a part of a beam or a structure projecting outwards beyond its support vb
4 to construct (a building member, beam, etc.) so that it is fixed at one end only
5 to project like a cantilever
(C17: perhaps from cant2 + lever)
cantilever bridge n
a bridge having spans that are constructed as cantilevers and often a suspended span or spans, each end of which rests on one end of a cantilever span