tree

1a :  a woody perennial plant having a single usually elongate main stem generally with few or no branches on its lower partb :  a shrub or herb of arborescent form rose trees a banana tree

2 :  something in the form of or resembling a tree: such asa :  a diagram or graph that branches usually from a simple stem or vertex without forming loops or polygons a genealogical tree phylogenetic treesb :  a much-branched system of channels especially in an animal body the vascular tree

3a (1) :  a piece of wood (such as a post or pole) usually adapted to a particular use or forming part of a structure or implement (2) archaic :  the cross on which Jesus was crucifiedb archaic :  gallows

4 :  saddletree