Definition of tranquilize verb from the Oxford Advanced American Dictionary

 

tranquilize

 verb
verb
NAmE//ˈtræŋkwəˌlaɪz//
 
tranquilize somebody/somethingVerb Forms present simple I / you / we / they tranquilize he / she / it tranquilizes past simple tranquilized -ing form tranquilizing
 
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to make a person or an animal calm or unconscious, especially by giving them a drug (= a tranquilizer ) A gamekeeper tranquilized the rhinoceros with a drugged dart.