See also: tree-



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A tree structure


From Middle English tree, tre, treo, treou, trew, trow, from Old English trēo, trēow ‎(tree, wood, timber, beam, log, stake, stick, grove, cross, rood), from Proto-Germanic *trewą ‎(tree, wood), from pre-Germanic *dréu̯om, thematic e-grade derivative of Proto-Indo-European *dóru ‎(tree). Cognate with Scots tree ‎(wood, rod, stick), North Frisian tre, trä ‎(tree), Middle Dutch tree > Dutch teer ‎(tree), Danish træ ‎(tree), Swedish trä ‎(wood), träd ‎(tree), Norwegian tre ‎(tree), Icelandic tré ‎(tree), Gothic 𐍄𐍂𐌹𐌿 ‎(triu, tree, wood, piece of wood), Albanian dru ‎(tree, wood), Welsh dâr ‎(oaks), Ancient Greek δόρυ ‎(dóru, wood, spear), Russian де́рево ‎(dérevo) or дре́во ‎(drévo), Tocharian A or. Related to tar, true.



tree ‎(plural trees or (obsolete) treen)

  1. A large plant, not exactly defined, but typically over four meters in height, with a single trunk which grows in girth with age and branches (which 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. Any plant that is reminiscent of the above but not classified as a tree in the strict botanical sense: for example the banana "tree".
  3. 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. A device used to hold or stretch a shoe open.
    He put a shoe tree in each of his shoes.
  5. The structural frame of a saddle.
  6. (graph theory) A connected graph with no cycles or, equivalently, a connected graph with n vertices and n-1 edges.
  7. (computing theory) A recursive data structure in which each node has zero or more nodes as children.
  8. (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. Any structure or construct having branches akin to (1).
  10. The structure or wooden frame used in the construction of a saddle used in horse riding.
  11. (informal) Marijuana.
    • 2005, Eminem and Nate Dogg (lyrics), “Shake That”, in Curtain Call: The Hits:
      I like good pussy and I like good trees / Smoke so much weed you wouldn't believe
  12. (obsolete) A cross or gallows.
    Tyburn tree
    • Bible, Acts x. 39
      [Jesus] whom they slew and hanged on a tree.
  13. (obsolete) wood; timber
    • Wyclif Bible (2 Tim. ii. 20)
      In a great house ben not only vessels of gold and of silver but also of tree and of earth.
  14. (chemistry) A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution.

Derived termsEdit






See alsoEdit


tree ‎(third-person singular simple present trees, present participle treeing, simple past and past participle treed)

  1. (transitive) To chase (an animal or person) up a tree.
    The dog treed the cat.
    • Encyclopaedia of Sport
      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.
  2. (transitive) To place upon a tree; to fit with a tree; to stretch upon a tree.
    to tree a boot



Most common English words before 1923: notice · week · stone · #780: tree · cost · value · cast



Alternative formsEdit



tree m ‎(plural treeën or trees, diminutive treetje n)

  1. step (of a staircase), stair


North FrisianEdit


From Old Frisian thrē.



  1. (Heligoland) three
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