| tree | |
| 1. n. (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. n. (botany) Any plant that is reminiscent of the above but not classified as a tree in the strict botanical sense. | |
| the banana tree | |
| 3. n. 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. n. A device used to hold or stretch a shoe open. | |
| He put a shoe tree in each of his shoes. | |
| 5. n. The structural frame of a saddle. | |
| 6. n. (graph theory) A connected graph with no cycles or, equivalently, a connected graph with n vertices and n-1 edges. | |
| 7. n. (computing theory) A recursive data structure in which each node has zero or more nodes as children. | |
| 8. n. (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. n. Any structure or construct having branches akin to (1). | |
| family tree; skill tree | |
| 10. n. The structure or wooden frame used in the construction of a saddle used in horse riding. | |
| 11. n. (slang) Marijuana. | |
| 12. n. (obsolete) A cross or gallows. | |
| Tyburn tree | |
| 13. n. (obsolete) wood; timber | |
| 14. n. (chemistry) A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution. | |
| 15. n. (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. | |
| to tree a boot | |
