mac ‧ a ‧ ro ‧ ni /ˌmækəˈrəʊni $ -ˈroʊ-/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Language: Italian ; Origin: maccheroni , from Italian dialect maccarone , probably from Greek makaria 'food made from barley' ]
a type of ↑ pasta in the shape of small tubes
macaroni cheese British English /macaroni and cheese American English (=macaroni cooked with a cheese sauce)