al ‧ fres ‧ co /ælˈfreskəʊ $ -koʊ/ BrE AmE adjective , adverb
[ Date: 1700-1800 ; Language: Italian ; Origin: 'in the fresh (air)' ]
if you eat alfresco, you eat in the open air:
We dined alfresco, on a balcony overlooking the sea.
alfresco lunch/supper etc