up a tree Definition

tree
noun trees

1a. bot.
A tall woody perennial plant that typically has one main stem or trunk and which, unlike a shrub, usually only begins to branch at some distance from the ground;
1b. bot.
In extended use: any plant, eg the banana, plantain, palm, etc, that has a single non-woody stem which grows to a considerable height.
2. A family tree.
3a. A frame or support, especially one made from wood;

Example: shoe tree
3b. A branched structure that things can be hung on.

Example: ring tree
4. A Christmas tree.

Example: lots of presents under the tree
5a. old use
A cross that is used for crucifixion;
5b. old use
A gallows or gibbet.

verb

treed, treeing
1. To drive or chase up a tree.

Derivative: treeless
adj

Idiom: at the top of the tree

At the highest possible position, especially professionally, etc.

Idiom: out of one's tree

Completely mad, especially in talking rubbish or behaving irrationally.

Idiom: up a tree

( Amer)
colloq
In difficulties. See also arboreal.

Etymology: Anglo-Saxon treow.