certainpayment
nounUK /ˈsɜːtən ˈpeɪmənt/
US /ˈsɜːrtən ˈpeɪmənt/
A certain payment is money you are sure you will get or give.
The worker was happy because his certain payment arrived on Friday.
OTHER MEANINGS
2. A payment that is agreed and cannot be changed.
The rent is a certain payment of five hundred dollars each month.
3. Money paid for a specific, named purpose.
The certain payment covered only the school books.
4. A payment made with confidence because the deal is safe.
She made a certain payment after checking the contract twice.