tree

The word "tree" usually refers to a tall woody plant with a main trunk and branches growing from it. In everyday life, people use it for many kinds of plants, such as oak trees, palm trees, pine trees, and apple trees. Trees are important in nature and in human life. They give shade, wood, fruit, and shelter for animals, and they help keep the air and soil healthy. You may sit under a tree on a hot day, climb one as a child, cut one down for lumber, or plant one to mark a special event.

The word also has several important extended meanings. A family tree is a chart of family relationships. A decision tree is a diagram that shows choices and results. In computing and other technical fields, a tree is any branching structure with parts that split from a main point. People also use the word for objects shaped like this, such as a Christmas tree or a tree-shaped diagram. Because of all this, "tree" is both a basic nature word and a common way to describe branching forms, relationships, and ideas.