English Reference
adjective · verb

dull

adj. · v.
US /ˈdəɫ/ UK /dˈʌl/ dull UK spelling dulls

  1. 01 B1 Intermediate

    adj.not interesting or exciting in any way.

    adj.lacking interest or excitement; tedious.

    Simple

    The lecture was so dull that half the students fell asleep.

    In context

    The critic dismissed the film as a dull repetition of tropes that have been explored more effectively in earlier works.

  2. 02 B2 Upper Intermediate

    adj.having an edge that is not sharp and cannot cut easily.

    adj.lacking a sharp edge or point; blunt.

    Simple

    It is difficult to chop vegetables with such a dull knife.

    In context

    The carpenter set aside the dull chisel, noting that the blade required significant honing before it could produce a clean cut.

  3. 03 B1 Intermediate

    adj.not bright, shiny, or clear; often used for colours or weather.

    adj.lacking brilliance or luster; matte or overcast.

    Simple

    The sky was a dull grey just before the rain started to fall.

    In context

    Years of neglect had left the silver trophy with a dull finish that resisted even the most vigorous polishing.

  4. 04 B2 Upper Intermediate Medicine

    adj.used to describe a pain that is not sharp but stays for a long time.

    adj.describing a physical sensation that is indistinct, muffled, or lacking in sharpness but persistent.

    Simple

    He felt a dull ache in his lower back after working in the garden.

    In context

    The patient complained of a dull, throbbing sensation in her temples that intensified whenever she was exposed to bright light.

  5. 05 B2 Upper Intermediate

    v.to make a feeling, pain, or sound less strong or sharp.

    v.to moderate, soften, or reduce the intensity of a sensation or quality.

    Simple

    The doctor gave her some medicine to dull the pain after the surgery.

    In context

    The heavy curtains were designed to dull the noise from the busy street outside, creating a quiet sanctuary for the residents.

  6. 06 C1 Advanced Formal

    v.to make an edge less sharp through use or damage.

    v.to remove the sharpness of an edge or point; to blunt.

    Simple

    Cutting through thick cardboard will quickly dull your scissors.

    In context

    Constant contact with the abrasive sandy soil served to dull the plough's blade far sooner than the farmer had anticipated.

When your nose is blocked, even your favorite foods can seem dull.

The Conversation· 3 Aug 2026

She was asked to speak about geography in Scotland, which she thought could be “quite dull”, and instead began researching the first Geographer Royal, who turned out to be “a really interesting character”.

The Guardian· 28 Jul 2026

From Middle English dull, dul (also dyll, dill, dwal), from Old English dol (“dull, foolish, erring, heretical; foolish, silly; presumptuous”), from Proto-West Germanic dol, from Proto-Germanic dulaz, from earlier dwulaz, a variant of dwalaz (“stunned, mad, foolish, misled”), from Proto-Indo-European dʰwel-, dʰewel- (“to dim, dull, cloud, make obscure, swirl, whirl”). Cognate with Scots dull, doll (“slow to understand or hear, deaf, dull”), North Frisian dol (“rash, unthinking, giddy, flippant”), Dutch dol (“crazy, mad, insane”), Low German dul, dol (“mad, silly, stupid, fatuous”), German toll (“crazy, mad, wild, fantastic”), Danish dval (“foolish, absurd”), Icelandic dulur (“secretive, silent”), West-Flemish dul (angry, furious).

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin ine-pro *dʰwel-
Level B2 · Upper Intermediate
Frequency Frequent
Updated