What is the degree of a tree? (As in, a tree ADT)

Question

I understand that the degree of a node is the number of children it has.

However, how do we define the degree of a tree?

Answer 1

There are 2 different definitions floating around:

• Degree of the tree is the maximum of the degrees of the nodes of the tree. (From 'Software engineering, algorithm design and analysis', Volume 2, I. Pu, 2006)
• Degree of tree the degree of the root. (From Wikipedia)

So we'll have to derive the meaning from context ☠️☠️.