To render dull; to remove or blunt an edge or something that was sharp.
Years of misuse have dulled the tools.
To soften, moderate or blunt; to make dull, stupid, or sluggish; to stupefy.
He drinks to dull the pain.
To lose a sharp edge; to become dull.
A razor will dull with use.
To render dim or obscure; to sully; to tarnish.
Lacking the ability to cut easily; not sharp.
All these knives are dull.
Boring; not exciting or interesting.
He sat through the dull lecture and barely stayed awake.
Not shiny; having a matte finish or no particular luster or brightness.
Choose a dull finish to hide fingerprints.
Not bright or intelligent; stupid; having slow understanding.
Sluggish, listless.
Cloudy, overcast.
It's a dull day.
Insensible; unfeeling.
Heavy; lifeless; inert.
(of pain etc) Not intense; felt indistinctly or only slightly.
Pressing on the bruise produces a dull pain.
(of a noise or sound) Not clear, muffled.