An Encylopedia Britannica Company

must–see

1 ENTRIES FOUND:
must–see /ˈmʌstˈsiː/ noun
plural must–sees
must–see
/ˈmʌstˈsiː/
noun
plural must–sees
Britannica Dictionary definition of MUST–SEE
[count] chiefly US, informal
: something that must or should be seen

— must–see

adjective, always used before a noun