/ ˈʌpkiːp; NAmE / noun [ U ]
1.
upkeep (of sth) the cost or process of keeping sth in good condition
SYN maintenance :
Tenants are responsible for the upkeep of rented property.
2.
upkeep (of sb/sth) the cost or process of giving a child or an animal the things that they need :
He makes payments to his ex-wife for the upkeep of their children.