Definition of mildest:
(adj) :
(of food, drink, or a drug) Not sharp or bitter; not strong in flavor.
(adj) :
(of weather) Moderately warm, especially less cold than expected.
(adj) :
(of an illness or pain) Not serious or dangerous.
(adj) :
Gentle and not easily angered.
(adj) :
(of a rule or punishment) Of only moderate severity; not strict.
(adj) :
(of a medicine or cosmetic) Acting gently and without causing harm.