ˌprimary ˈsource BrE AmE noun [countable]
a document, book etc that contains information that has been obtained from people’s experiences and not taken from other documents, books etc ⇨ secondary source
ˌprimary ˈsource BrE AmE noun [countable]
a document, book etc that contains information that has been obtained from people’s experiences and not taken from other documents, books etc ⇨ secondary source
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012