■ adjective
1》 lacking interest or excitement.
2》 not bright or shiny.
↘(of the weather) overcast.
3》 slow to understand.
↘slow-moving.
4》 indistinctly felt or heard.
■ verb make or become ~.
Derivatives
~ish adjective
~ness (also dulness ) noun
~y 'dʌlˌli adverb
Origin
OE dol 'stupid', of Gmc origin.