Meaning of SMEAR in English

SMEAR

[noun] [C]You'd look very stylish if it wasn't for that smear of ketchup on your shirt.A smear (test) (US and ANZ pap smear) is an examination of cells contained in the thick liquid on the surface of a woman's cervix (= entrance to the womb) to discover if there is any disease: Cervical smears help to show abnormalities which might lead to cancer before any obvious symptoms have appeared.Cervical smears help to show abnormalities which might lead to cancer before any obvious symptoms have appeared.

Cambridge English vocab.      Кембриджский английский словарь.