1. A leafy, shady recess formed by tree branches, shrubs, etc.
2. A latticework bower intertwined with climbing vines and flowers.
3. A trellis or other structure used to support plants that form an arbor.
3. A grass plot; lawn; garden; orchard.
4. A bar, shaft, or axis that holds, turns, or supports a rotating cutting tool or grinding wheel, often having a tapered shank fitting tightly into the spindle of a machine tool.

1. Any of several North American or eastern Asian evergreen trees or shrubs of the genus Thuja, having flattened branchlets with opposite, scalelike leaves and small cones.

They are grown as ornamentals and for timber.

2. The white nerve tissue of the cerebellum, which has a treelike outline in a median section.

May the tree thrive.

Motto of the University of Toronto, Toronto, Ontario, Canada.

From the University of Toronto's Web site: "The form of the crest as it exists today, was adopted by the University of Toronto in 1917 when the Board of Governors of the University, on account of the many incorrect forms in common use, applied to the College of Heralds for a correct emblazoning of the Arms of the University of Toronto and of University College.

The motto velut arbor aevo is generally translated "As a tree in the passage of time" in the University's motto.