inhalantPronunciation: /ɪnˈheɪl(ə)nt/Definition of inhalant noun a medicinal preparation for inhaling. a solvent or other material producing vapour that is inhaled by drug abusers. adjective [attributive] chiefly Zoology serving for inhalation:an inhalant siphoninhalant in other Oxford dictionaries Definition of inhalant in the US English dictionary