#1 dampen v. [stifle] smother or suppress; "Stifle your curiosity". wn
#2 dampen v. [moisten, wash] make moist; "The dew moistened the meadows". wn
#3 dampen v. [muffle, mute, dull, damp, tone down] deaden (a sound or noise), especially by wrapping. wn
#4 dampen v. reduce the amplitude (of oscillations or waves). wn
#5 dampen v. [deaden, damp] make vague or obscure or make (an image) less visible; "muffle the message". wn
vizzz