Definition of Arbor

Noun: arbor aar-bur
Usage: N. Amer, Austral (=arbour)

Tree (as opposed to shrub)
- arbour [Brit, Cdn]
Any of various rotating shafts that serve as axes for larger rotating parts
- spindle, mandrel, mandril, arbour [Brit, Cdn]
A framework that supports climbing plants
"the arbor provided a shady resting place in the park";
- arbour [Brit, Cdn], bower, pergola