ASSIDUITY Meaning of ASSIDUITY in English n. (pl. -ies) 1 constant or close attention to what one is doing. 2 (usu. in pl.) constant attentions to another person. [ L assiduitas (as ASSIDUOUS, -ITY) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012