o ‧ zone /ˈəʊzəʊn $ ˈoʊzoʊn/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: German ; Origin: ozon , from Greek , from ozein 'to smell' ]
1 . technical a poisonous blue gas that is a type of oxygen
2 . informal air near the sea, thought to be fresher and healthier