Meaning of “will” - Learner’s Dictionary

will

noun uk us /wɪl/
MENTAL POWER [ C, U ]

B2 the mental power to control your thoughts and actions or to succeed in doing something difficult:

She has a very strong will.
[ + to do sth ] He lacks the will to win.
WANT [ no plural ]

what someone wants:

She was forced to marry him against her will.
DOCUMENT [ C ]

a legal document that gives instructions about what should happen to your money and possessions after you die:

She left me some money in her will.
→ See also free will , ill will

(Definition of “will noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)