Furnishing little delight, spirit, or variety; uninteresting; tedious; cheerless; gloomy; melancholy; depressing; as, a dull story or sermon; a dull occupation or period; hence, cloudy; overcast; as, a dull day.
To deprive of sharpness of edge or point.
To make dull, stupid, or sluggish; to stupefy, as the senses, the feelings, the perceptions, and the like.
To render dim or obscure; to sully; to tarnish.
To deprive of liveliness or activity; to render heavy; to make inert; to depress; to weary; to sadden.
As a real person, he wouldn't last a minute, would he? But drama is about imperfection. And we've moved away from the aspirational hero. We got tired of it, it was dull. If I was House's friend, I would hate it. How he so resolutely refuses to be happy or take the kind-hearted road. But we don't always like morally good people, do we? Hugh Laurie
Once conform, once do what other people do because they do it, and a lethargy steals over all the finer nerves and faculties of the soul. She becomes all outer show and inward emptiness; dull, callous, and indifferent. Virginia Woolf
dull in Dutch is onnozel, dom, flauw, simpel
dull in French is terne, fade, obtus
dull in Italian is appannato, insipido
dull in Latin is bardus, stolidus, piger pigra pigrum
dull in Spanish is embotado, lasto, soso