child maintenance
noun🔊/ˌtʃaɪld ˈmeɪntənəns/
🔊/ˌtʃaɪld ˈmeɪntənəns/
(British English) (also child support British and North American English)
[uncountable]money that a parent must pay regularly to help support their child, when the child is no longer living with that parent