satisfaction
n. uncountablen. the good feeling you get when you achieve something or get what you wanted. It is the opposite of being disappointed.
n. a state of gratification or fulfillment arising from the achievement of a goal or the meeting of an expectation.
She smiled with satisfaction after finishing the difficult race.
The company conducts annual surveys to measure customer satisfaction with their new delivery service.
True professional satisfaction often stems not from the salary itself, but from the knowledge that one's daily labor contributes to a tangible, positive outcome for the community.
From Middle English satisfaccioun, from Old French satisfaccion and Latin satisfactiō, satisfactiōnis.
I have a big satisfactionI feel great satisfactionIn its general sense, the word is uncountable and does not take the indefinite article 'a'.