[ar.bor] n [ME erber plot of grass, arbor, fr. MF herbier plot of grass, fr. herbe herb, grass] (14c): a shelter of vines or branches or of latticework covered with climbing shrubs or vines
[2]arbor n [L, tree, shaft] (1659) 1: a spindle or axle of a wheel
2: a main shaft or beam
3: a shaft on which a revolving cutting tool is mounted
4: a spindle on a cutting machine that holds the work to be cut