make dull in appearance

become dull or lusterless in appearance; lose shine or brightness

deaden (a sound or noise), especially by wrapping

make numb or insensitive

make dull or blunt

become less interesting or attractive

make less lively or vigorous

lacking in liveliness or animation

emitting or reflecting very little light

being or made softer or less loud or clear

so lacking in interest as to cause mental weariness

(of color) very low in saturation; highly diluted

not keenly felt

slow to learn or understand; lacking intellectual acuity

(of business) not active or brisk

not having a sharp edge or point

blunted in responsiveness or sensibility

not clear and resonant; sounding as if striking with or against something relatively soft

darkened with overcast

of a dull shade of purple

of a dull shade of white

a person who is not very bright

a person who evokes boredom

having lost or been caused to lose interest because of overexposure

made dull or blunt

deprived of color

United States diplomat who (as Secretary of State) pursued a policy of opposition to the USSR by providing aid to American allies (1888-1959)

the quality of being slow to understand

the quality of lacking interestingness

a lack of visual brightness

lack of sensibility

without sharpness or clearness of edge or point

without liveliness

without luster or shine