Having the characteristics of something which can be seen, experienced, etc, every day or very commonly; commonplace, ordinary, mundane. [from 15th c.]
Noun
(medicine) A fever which recurs every day; quotidian malaria. [from 14th c.]
(Anglicanism, historical) A daily allowance formerly paid to certain members of the clergy. [from 16th c.]
(usually with definite article) Commonplace or mundane things regarded as a class. [from 20th c.]