Noun

(en-noun) (plural "treen" is obsolete)

A large plant, not exactly defined, but typically over four meters in height, a single trunk which grows in girth with age and branches (which also grow in circumference with age).

is the tallest living tree in the world.

Birds have a nest in a tree in the garden.

Any plant that is reminiscent of the above but not classified as a tree in the strict botanical sense: for example the banana "tree".

An object made from a tree trunk and having multiple hooks]] or storage [[platform, platforms.

He had the choice of buying a scratching post or a cat tree .

A device used to hold or stretch a shoe open.

He put a shoe tree in each of his shoes.

The structural frame of a saddle.

(graph theory) A connected graph with no cycles or, equivalently, a connected graph with n'' vertices and ''n -1 edges.

(computing theory) A recursive data structure in which each node has zero or more nodes as children.

(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.

Any structure or construct having branches akin to (1).

The structure or wooden frame used in the construction of a saddle used in horse riding.

(informal) Marijuana.

(obsolete) A cross or gallows.

Tyburn tree

* Bible, Acts x. 39

[Jesus] whom they slew and hanged on a tree .

(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.

(chemistry) A mass of crystals, aggregated in arborescent forms, obtained by precipitation of a metal from solution.

Noun

(en noun)

A dense collection of trees covering a relatively large area. Larger than woods.

* {{quote-magazine, date=2013-06-29, volume=407, issue=8842, page=29, magazine=(The Economist)

, title= Unspontaneous combustion , passage=Since the mid-1980s, when Indonesia first began to clear its bountiful forests on an industrial scale in favour of lucrative palm-oil plantations, “haze” has become an almost annual occurrence in South-East Asia. The cheapest way to clear logged woodland is to burn it, producing an acrid cloud of foul white smoke that, carried by the wind, can cover hundreds, or even thousands, of square miles.}}

Any dense collection or amount.

forest of criticism.

(historical) A defined area of land set aside in England as royal hunting ground or for other privileged use; all such areas.

* {{quote-book, year=2006, author=

, title=Internal Combustion , chapter=2 citation , passage=Throughout the 1500s, the populace roiled over a constellation of grievances of which the forest' emerged as a key focal point. The popular late Middle Ages fictional character Robin Hood, dressed in green to symbolize the ' forest , dodged fines for forest offenses and stole from the rich to give to the poor. But his appeal was painfully real and embodied the struggle over wood.}}

(graph theory) A disjoint union of trees.