sat·is·fac·tion 
(săt′ĭs-făkshən)
(săt′ĭs-făkshən)n.
1.
a. The fulfillment or gratification of a desire, need, or appetite: wanted more space and found satisfaction in a new apartment.
b. Pleasure or contentment derived from such gratification: took satisfaction in being vindicated.
c. An instance of being satisfied or a source of gratification: "Cultivate some artistic talent, for you will find it the most durable of satisfactions" (Randolph Bourne).
2. Assurance beyond doubt or question; complete conviction: You must prove your case to the satisfaction of the court.
3.
a. Compensation for injury or loss; reparation.
b. The opportunity to avenge a wrong; vindication.
[Middle English, from Old French, from Latin satisfactiō, satisfactiōn-, amends, from satisfactus, past participle of satisfacere, to satisfy; see SATISFY.]