Alimony

n. allowance paid to a former spouse (often by legal agreement)

Alimony, maintenance or spousal support is an obligation established by law in many countries that is based on the premise that both spouses have an absolute obligation to support each other during the marriage (or civil union) unless they are legally separated. In some instances the obligation to support may continue after separation.
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Noun
1. court-ordered support paid by one spouse to another after they are separated
(synonym) maintenance
(hypernym) support payment

(n.)
Maintenance; means of living.
  

(n.)
An allowance made to a wife out of her husband's estate or income for her support, upon her divorce or legal separation from him, or during a suit for the same.
  

An amount given to one spouse to another while they are separated. - (read more on Alimony)