chaserPronunciation: /ˈtʃeɪsə/Translate chaser | into Italian Definition of chaser noun 1a person or thing that pursues someone or something: [in combination]:a woman-chaser 2a horse for steeplechasing. 3 informal a strong alcoholic drink taken after a weaker one:drinking pints of bitter with vodka chaserschaser in other Oxford dictionaries Definition of chaser in the US English dictionary