Court-ordered support paid by one spouse to the other who has custody of the children after the parents are separated WordNet 3.0 & Open English WordNet

Child support is an ongoing, periodic payment made by a parent for the financial benefit of a child following the end of a marriage or other similar relationship. Wikipedia

Ongoing, periodic payment made by a parent for the financial benefit of a child. Wikipedia Disambiguation

Ongoing, periodic payment made by a parent for the financial benefit of a child following the end of a marriage or relationship Wikidata

The ongoing obligation for a periodic payment made directly or indirectly by an obligor, usually the noncustodial parent, to an obligee, usually the custodial parent or other guardian, for the financial care and support of children of a relationship or marriage that has been terminated, or which never existed. Wiktionary

Ongoing obligation for periodic payment. Wiktionary (translation)