tree

[tree]
noun
1.
a plant having a permanently woody main stem or trunk, ordinarily growing to a considerable height, and usually developing branches at some distance from the ground.
2.
any of various shrubs, bushes, and plants, as the banana, resembling a tree in form and size.
3.
something resembling a tree in shape, as a clothes tree or a crosstree.
4.
Mathematics, Linguistics, tree diagram.
6.
a pole, post, beam, bar, handle, or the like, as one forming part of some structure.
8.
a saddletree.
9.
a treelike group of crystals, as one forming in an electrolytic cell.
10.
a gallows or gibbet.
11.
the cross on which Christ was crucified.
12.
Computers. a data structure organized like a tree whose nodes store data elements and whose branches represent pointers to other nodes in the tree.
verb (used with object), treed, treeing.
14.
to drive into or up a tree, as a pursued animal or person.
15.
Informal. to put into a difficult position.
16.
to stretch or shape on a tree, as a boot.
17.
to furnish (a structure) with a tree.
Idioms
18.
up a tree, Informal. in a difficult or embarrassing situation; at a loss; stumped.

Origin:
before 900; Middle English; Old English trēo(w); cognate with Old Frisian, Old Norse trē, Old Saxon treo, Gothic triu; akin to Greek drŷs oak, Sanskrit, Avestan dru wood

treelike, adjective
Dictionary.com Unabridged

Tree

[tree]
noun
Sir Herbert Beerbohm [beer-bohm] , (Herbert Beerbohm) 1853–1917, English actor and theater manager; brother of Max Beerbohm.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
tree (triː)
 
n
1.  any large woody perennial plant with a distinct trunk giving rise to branches or leaves at some distance from the groundRelated: arboreal
2.  any plant that resembles this but has a trunk not made of wood, such as a palm tree
3.  a wooden post, bar, etc
4.  family tree shoetree See saddletree
5.  chem a treelike crystal growth; dendrite
6.  a.  a branching diagrammatic representation of something, such as the grammatical structure of a sentence
 b.  (as modifier): a tree diagram
7.  an archaic word for gallows
8.  archaic the cross on which Christ was crucified
9.  at the top of the tree in the highest position of a profession, etc
10.  informal (US), (Canadian) up a tree in a difficult situation; trapped or stumped
 
vb , trees, treeing, treed
11.  to drive or force up a tree
12.  to shape or stretch (a shoe) on a shoetree
 
Related: arboreal
 
[Old English trēo; related to Old Frisian, Old Norse trē, Old Saxon trio, Gothic triu, Greek doru wood, drus tree]
 
'treeless
 
adj
 
'treelessness
 
n
 
'treelike
 
adj

Tree (triː)
 
n
Sir Herbert Beerbohm. 1853--1917, English actor and theatre manager; half-brother of Sir Max Beerbohm. He was noted for his lavish productions of Shakespeare

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

tree
O.E. treo, treow "tree" (also "wood"), from P.Gmc. *trewan (cf. O.Fris. tre, O.S. trio, O.N. tre, Goth. triu), from PIE *deru-/*doru- "oak" (cf. Skt. dru "tree, wood," daru "wood, log;" Gk. drys "oak," doru "spear;" O.C.S. drievo "tree, wood;" Serb. drvo "tree," drva "wood;" Rus. drevo "tree, wood;"
Czech drva; Pol. drwa "wood;" Lith. derva "pine wood;" O.Ir. daur, Welsh derwen "oak," Albanian drusk "oak"). Importance of the oak in mythology is reflected in the recurring use of words for "oak" to mean "tree." In O.E. and M.E., also "thing made of wood," especially the cross of the Crucifixion and a gallows (cf. Tyburn tree, gallows mentioned 12c. at Tyburn, at junction of Oxford Street and Edgware Road, place of public execution for Middlesex until 1783). Sense in family tree first attested 1706; verb meaning "to chase up a tree" is from 1700. Tree-hugger, contemptuous for "environmentalist" is attested by 1989.
"Minc'd Pyes do not grow upon every tree,
But search the Ovens for them, and there they be."
["Poor Robin," Almanack, 1669]
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
tree   (trē)  Pronunciation Key 
Any of a wide variety of perennial plants typically having a single woody stem, and usually branches and leaves. Many species of both gymnosperms (notably the conifers) and angiosperms grow in the form of trees. The ancient forests of the Devonian, Mississippian, and Pennsylvanian periods of the Paleozoic Era were dominated by trees belonging to groups of seedless plants such as the lycophytes. The strength and height of trees are made possible by the supportive conductive tissue known as vascular tissue.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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FOLDOC
Computing Dictionary

tree definition

mathematics, data
A directed acyclic graph; i.e. a graph wherein there is only one route between any pair of nodes, and there is a notion of "toward top of the tree" (i.e. the root node), and its opposite direction, toward the leaves. A tree with n nodes has n-1 edges.
Although maybe not part of the widest definition of a tree, a common constraint is that no node can have more than one parent. Moreover, for some applications, it is necessary to consider a node's daughter nodes to be an ordered list, instead of merely a set.
As a data structure in computer programs, trees are used in everything from B-trees in databases and file systems, to game trees in game theory, to syntax trees in a human or computer languages.
(1998-11-12)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Idioms & Phrases

tree

see bark up the wrong tree; can't see the forest for the trees; talk someone's arm off (the bark off a tree); up a tree.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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Example sentences
Small to large tree with broad, rounded crown of spreading or drooping branches
  and the largest leaves of all maples.
The birds typically choose large, older trees for nesting and usually inhabit a
  tree hole.
But three years ago leaves on a few branches on one side of the tree started to
  wilt.
Tree branches have inspired efficient transit networks, but a new study finds
  inspiration in leaves.
Images for tree
Synonyms
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