A more thorough explanation:

Definition: Mutual means that something is common or reciprocal. It often describes joint action or agreement by two parties.

For example, if two friends have a mutual agreement to split the cost of a pizza, they both agree to pay for half of it. Another example is a mutual friendship, where both people enjoy spending time with each other and have a positive relationship.

The examples illustrate the definition of mutual because they both involve two parties who have agreed to something together. In both cases, there is a shared understanding and cooperation between the parties involved.