noun
A perennial woody plant taller and larger than a shrub with a wooden trunk and, at some distance from the ground, having leaves and branches.
Hyperion is the tallest living tree in the world.
Birds have a nest in a tree in the garden.
Any other plant (such as a large shrub or herb) that is reminiscent of the above in form and size.
The banana tree is a tall perennial herb: its trunk is not woody.
An object made from a tree trunk and having multiple hooks or storage platforms.
He had the choice of buying a scratching post or a cat tree.
A device used to hold or stretch a shoe open.
He put a shoe tree in each of his shoes.
The structural frame of a saddle.
verb
To chase (an animal or person) up a tree.
The dog treed the cat.
When hunted it [the jaguar] takes refuge in trees, and this habit is well known to hunters, who pursue it with dogs and pot it when treed.
To place in a tree.
Black bears can tree their cubs for protection, but grizzly bears cannot.
To place upon a shoe tree; to fit with a shoe tree; to stretch upon a shoe tree.
to tree a boot
Two suits and an overcoat hung in the closet over three pairs of carefully treed shoes.
To take refuge in a tree.
noun
An extremely fast-growing function based on Kruskal's tree theorem.