1.lacking in liveliness or animation;
he was so dull at parties
2.emitting or reflecting very little light;
a dull glow
3.being or made softer or less loud or clear;
the dull boom of distant breaking waves
4.so lacking in interest as to cause mental weariness;
a boring evening with uninteresting people
5.(of color) very low in saturation; highly diluted;
dull greens and blues
6.not keenly felt;
a dull throbbing
7.slow to learn or understand; lacking intellectual acuity;
so dense he never understands anything I say to him
8.(of business) not active or brisk;
business is dull (or slow)
9.not having a sharp edge or point;
the knife was too dull to be of any use
10. blunted in responsiveness or sensibility;
a dull gaze
11. not clear and resonant; sounding as if striking with or against something relatively soft;
the dull thud
12. darkened with overcast;
a dark day
1.make dull in appearance;
Age had dulled the surface
2.become dull or lusterless in appearance; lose shine or brightness;
the varnished table top dulled with time
3.deaden (a sound or noise), especially by wrapping
4.make numb or insensitive;
The shock numbed her senses
5.make dull or blunt;
Too much cutting dulls the knife's edge
6.become less interesting or attractive
7.make less lively or vigorous;
Middle age dulled her appetite for travel