not clear or bright; slow to understand; not exciting or interesting
unintelligent
Cases of word usage
1) dull continuous pain (ache)
2) dull yellow (colour) (buff)
3) dull because often repeated (corny)
4) (of clothes etc) dull or unfashionable (dowdy)
5) the act, result, of dragging; a person, thing, that is boring, dull and annoying (drag)
6) dull because too ordinary (humdrum)
7) lifeless; without interest; dull (inanimate)
8) (cloth, military uniform, of) dull yellowish-brown (khaki)
9) having the grey colour of lead; dull and sad (leaden)
10) a solid mass, usually without a regular shape; a swelling or bump; a dull person (lump)