ˈserial ˌnumber BrE AmE noun [countable]
a number put on things that are produced in large quantities, so that each one has its own different number:
Each computer has a serial number on it.
ˈserial ˌnumber BrE AmE noun [countable]
a number put on things that are produced in large quantities, so that each one has its own different number:
Each computer has a serial number on it.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012