1max·i·mum 
/ˈmæksəməm/ noun
plural max·i·mums or technical max·i·ma /ˈmæksəməm/ noun /-əmə/ [count] : the highest number or amount that is possible or allowed — usually singular ▪ Twenty years is the maximum. ▪ This security system gives you the maximum in protection. — often + of ▪ You may invite a maximum of 10 guests to the party. ▪ You may stay for a maximum of two weeks. ▪ She will serve a minimum of 10 and a maximum of 20 years in jail. — opposite minimum
