1. (

• arbor

) tree (as opposed to shrub) ;

2. (

• spindle ,
• mandrel ,
• mandril ,
• arbor ,

) any of various rotating shafts that serve as axes for larger rotating parts ;

3. (

• arbor ,
• arbour ,
• bower ,
• pergola

) a framework that supports climbing plants; "the arbor provided a shady resting place in the park" ;