① [C, U] the ability to control your thoughts and actions in order to achieve what you want to do; a feeling of strong determination to do sth that you want to do: to have a strong will ◆ to have an iron will / a will of iron ◆ Her decision to continue shows great strength of will. ◆ In spite of what happened, he never lost the will to live. ◆ The meeting turned out to be a clash of wills. ◆ She always wants to impose her will on other people (= to get what she wants).
③ (also testament) [C] a legal document that says what is to happen to sb's money and property after they die: I ought to make a will. ◆ My father left me the house in his will.