Behavior versus Behaviour

What is the Difference Between Behavior and Behaviour?

When to Use Behavior

Behavior is a noun that refers to observable actions, usually those of a person or animal.

Behavior is the standard form of this word in American English.

When to Use Behaviour

Behaviour is the British spelling of the same word. It has all the same meanings as behavior, and British writers use it in all the same contexts that American writers use behavior.

Summary

Is it behavior or behaviour? Behavior and behavior are two versions of the same noun, which means observable actions performed by a person, animal, or machine. Even though they mean the same thing, they are used in different language communities.