(adjective, verb)


1. lacking in liveliness or animation

- he was so dull at parties

- a dull political campaign

- a large dull impassive man

Similar word(s): unanimated, colorless, colourless, arid, desiccate, desiccated, bovine, drab, dreary, heavy, leaden, humdrum, monotonous, lackluster, lacklustre, lusterless, lustreless, spiritless

2. emitting or reflecting very little light

- a dull glow

- dull silver badly in need of a polish

Similar word(s): flat, mat, matt, matte, matted, lackluster, lacklustre, lusterless, lustreless, soft, subdued, unpolished

3. being or made softer or less loud or clear

- the dull boom of distant breaking waves

Similar word(s): soft, muffled, muted, softened

4. so lacking in interest as to cause mental weariness

- a dull play

- his competent but dull performance

Similar word(s): uninteresting, boring, deadening, irksome, slow, tedious, tiresome, wearisome

5. (of color) very low in saturation; highly diluted

- dull greens and blues

Similar word(s): unsaturated

6. not keenly felt

- a dull throbbing

- dull pain

Similar word(s): deadened

7. slow to learn or understand; lacking intellectual acuity

- although dull at classical learning, at mathematics he was uncommonly quick

Similar word(s): stupid, dense, dim, dumb, obtuse, slow

8. (of business) not active or brisk

- business is dull (or slow)

Similar word(s): inactive, slow, sluggish

9. not having a sharp edge or point

- the knife was too dull to be of any use

Similar word(s): blunt, blunted, dulled, edgeless, unsharpened

10. blunted in responsiveness or sensibility

- a dull gaze

- so exhausted she was dull to what went on about her

Similar word(s): insensitive

11. not clear and resonant; sounding as if striking with or against something relatively soft

- the dull thud

Similar word(s): nonresonant, unreverberant, thudding

12. darkened with overcast

- a dull sky

Similar word(s): cloudy, leaden

Sentences with dull as an adjective:

- All these knives are dull.

- He sat through the dull lecture and barely stayed awake.

- When does having a dull personality ever get you a girlfriend? Even if you get one, how does being dull help you keep a relationship for over a year?

- Choose a dull finish to hide fingerprints.

- a dull fire or lamp;  a dull red or yellow;  a dull mirror

- It's a dull day.

- Pressing on the bruise produces a dull pain.


1. make dull in appearance

- Age had dulled the surface

Definition categories: contact, alter, change, modify

2. become dull or lusterless in appearance; lose shine or brightness

- the varnished table top dulled with time

Definition categories: change

3. deaden (a sound or noise), especially by wrapping

Similar word(s): damp, dampen, muffle, mute

Definition categories: perception, soften

4. make numb or insensitive

Similar word(s): benumb, blunt, numb

Definition categories: perception, desensitise, desensitize

5. make dull or blunt

- Too much cutting dulls the knife's edge

Similar word(s): blunt

Definition categories: contact, alter, change, modify

6. become less interesting or attractive

Similar word(s): pall

Definition categories: change

7. make less lively or vigorous

- Middle age dulled her appetite for travel

Definition categories: change, weaken

Sentences with dull as a verb:

- Years of misuse have dulled the tools.

- He drinks to dull the pain.

- A razor will dull with use.