ca ‧ tarrh /kəˈtɑː $ -ˈtɑːr/ BrE AmE noun [uncountable] British English
[ Date: 1400-1500 ; Language: French ; Origin: catarrhe , from Greek katarrhein 'to flow down' ]
an uncomfortable condition in which your body produces a thick liquid that blocks your nose and throat:
After a cold, many patients complain of persistent catarrh.