SLIM Meaning of SLIM in English adj. 1 See slender, 1, above. 2 See slender, 2, 3, above. v. 3 reduce, lose or shed weight, diet, Chiefly US slenderize I really must slim if I am to fit into my summer clothes Oxford thesaurus English vocab. Английский словарь Оксфорд тезаурус. 2012