quantum meruit /ˌkwɒntəm ˈmɛrʊɪt 
/ ▸ noun [mass noun, usually as modifier] Law a reasonable sum of money to be paid for services rendered or work done when the amount due is not stipulated in a legally enforceable contract: he was entitled to be paid on a quantum meruit basis.
– ORIGIN Latin, literally ‘as much as he has deserved’.
EnglishOxford Dictionary of English
