A tree is a woody plant. Tree may also refer to:

Slang for cannabis

"Trees" (poem), a poem by Joyce Kilmer

Trees is a slang for cannabis

In linguistic syntax, a structure used to describe sentence structure

Evolutionary tree

"The Trees" (Autechre song), a song by Autechre

Trees (film), a 1999 direct to video horror film

Tree (data structure), a widely-used computer data structure that emulates a tree structure with a set of linked nodes

"Trees" (song), a song by Lovehammers

Herbert Tree (actor) was a British actor of the late 1800s

Decision tree

Stanford Tree, Stanford University's unofficial mascot

Tree (graph theory), a graph in which any two vertices are connected by exactly one path

Tree structure, a way of representing the hierarchical nature of a structure in a graphical form

World Tree, a motif present in several Indo-European religions

Tree (set theory), a partially ordered set (poset) (T, <) such that for each t ∈ T, the set {s ∈ T : s < t} is well-ordered by the relation <

The Trees, a song on Rush's 1978 album Hemisphere

TREE, Trends in ecology and evolution a scientific journal

Mesoamerican world tree, a mythical and cosmological conception among pre-Columbian Mesoamerican cultures

Electrical treeing, a process whereby branching channels, or chains of small fractures, are created within, or on the surface of, a solid dielectric material

"The Trees" (song), a song by British pop band Pulp

Tree63, a Christian rock band

Tree (descriptive set theory), a set of finite sequences of elements of X that is closed under subsequences, on a set X

Trees (folk band), British folk band

Family tree

Tree (Unix), a recursive directory listing program that produces a depth indented listing of files

Treeing, a method of hunting

Trees (band), one-man new wave band

A nickname for those who are the third of their name, similar to the use of the name Trey

TreePeople, a nonprofit environmental group based in Los Angeles

Shoe tree, a device for storing shoes

Tree River, a Canadian river

The Trees (novel), a novel by Conrad Richter