ˌprimary ˈcolour BrE AmE noun [countable]
one of the three colours red, yellow, and blue, which you can mix together to make any of the other colours
ˌprimary ˈcolour BrE AmE noun [countable]
one of the three colours red, yellow, and blue, which you can mix together to make any of the other colours
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012