Ăs'/si-dū'i-ty, n.

n. [Lat. assiduitas, Fr. assiduité, Pr. assiduitat. See ASSIDUOUS.] Constant or close application or attention, particularly to some business or enterprise; diligence. I have, with much pains and assiduity, qualified myself for a nomenclator. Addison. ☞ Assiduities, in the plural, are studied and persevering attentions to persons.