Not exceptional; not worthy of special merit, attention, or interest; having no vitality.
Having no shine or lustre; dull.
Lacking brilliance or intelligence.
Lack of brightness or points of interest.
A person or thing of no particular brilliance or intelligence.
Not noble; ignoble; base.
Of a metal, being at the lower end of the electrochemical series, i.e. oxidising readily.
To make (someone or something) no longer noble