1. s. (botany) A large plant, not exactly defined, but typically over four meters in height, with a single trunk that grows in girth with age and branches (that also grow in circumference with age).
Hyperion is the tallest living tree in the world.
Birds have a nest in a tree in the garden.
2. s. (botany) Any plant that is reminiscent of the above but not classified as a tree in the strict botanical sense.
the banana tree
3. s. 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.
4. s. A device used to hold or stretch a shoe open.
He put a shoe tree in each of his shoes.
5. s. The structural frame of a saddle.
6. s. (graph theory) A connected graph with no cycles or, equivalently, a connected graph with n vertices and n-1 edges.
7. s. (computing theory) A recursive data structure in which each node has zero or more nodes as children.
8. s. (graphical user interface) A display or listing of entries or elements such that there are primary and secondary entries shown, usually linked by drawn lines or by indenting to the right.
We’ll show it as a tree list.
9. s. Any structure or construct having branches akin to (1).
family tree; skill tree
10. s. The structure or wooden frame used in the construction of a saddle used in horse riding.
11. s. (slang) Marijuana.
12. s. (obsolete) A cross or gallows.
Tyburn tree
13. s. (obsolete) wood; timber
14. s. (chemistry) A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution.
15. s. (cartomancy) The fifth Lenormand card.
16. v. To chase (an animal or person) up a tree.
The dog treed the cat.
17. v. To place in a tree.
Black bears can tree their cubs for protection, but grizzly bears cannot.
18. v. To place upon a tree; to fit with a tree; to stretch upon a tree.
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