STOLID Meaning of STOLID in English adj. 25B6; adjective IMPASSIVE, phlegmatic, unemotional, cool, calm, placid, unexcitable; dependable; unimaginative, dull. emotional, lively, imaginative. Concise Oxford thesaurus English vocabulary. Краткий оксфордский словарь английского языка тезаурус. 2012