tree

noun14

1. •
   a tall plant with one main part made of wood that holds its leaves high above the ground

   • Hyperion is the tallest living tree in the world.
   • Birds have a nest in a tree in the garden.
2. •
   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.
3. •
   A connected graph with no cycles or, if the graph is finite, equivalently a connected graph with n vertices and n−1 edges.
4. •
   A recursive data structure in which each node has zero or more nodes as children, but does not share children with other nodes.
5. •
   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.
6. •
   Any structure or construct having branches representing divergence or possible choices.
7. •
   [in the plural] (slang) Marijuana.

   • I like good pussy and I like good trees / Smoke so much weed you wouldn't believe — 2005
8. •
   A device used to hold or stretch a shoe open.

   • He put a shoe tree in each of his shoes.
9. •
   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.
10. •
    The structural frame of a saddle.
11. •
    The structure or wooden frame used in the construction of a saddle used in horse riding.
12. •
    A cross or gallows.

    • The God of our fathers raised up Jesus, whom ye slew and hanged on a tree. — 1611
13. •
    The fifth Lenormand card.
14. •
    A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution.

verb4

1. •
   To chase (an animal or person) up a tree.

   • The dog treed the cat.
2. •
   To place in a tree.

   • Black bears can tree their cubs for protection, but grizzly bears cannot.
3. •
   To take refuge in a tree.
4. •
   To place upon a shoe tree; to fit with a shoe tree; to stretch upon a shoe tree.

   • Two suits and an overcoat hung in the closet over three pairs of carefully treed shoes. — 1930

noun1

1. •
   An extremely fast-growing function based on Kruskal's tree theorem.