Synonym: blunt, boring, dingy, dreary, dry, flat, gray, inactive, slow, sluggish, stupid, uninteresting, bright, keen, sharp, vivid. Similar words: adult, schedule, indulge, adultery, modulate, undulant, credulous, pendulum. Meaning: [dʌl] 
v. 1. make dull in appearance 2. become dull or lusterless in appearance; lose shine or brightness 3. deaden (a sound or noise), especially by wrapping 4. make numb or insensitive 5. make dull or blunt 6. become less interesting or attractive 7. make less lively or vigorous. adj. 1. lacking in liveliness or animation 2. emitting or reflecting very little light 3. being or made softer or less loud or clear 4. so lacking in interest as to cause mental weariness 5. (of color) very low in saturation; highly diluted 6. not keenly felt 7. slow to learn or understand; lacking intellectual acuity 8. (of business) not active or brisk 9. not having a sharp edge or point 10. blunted in responsiveness or sensibility 11. not clear and resonant; sounding as if striking with or against something relatively soft 12. darkened with overcast.
v. 1. make dull in appearance 2. become dull or lusterless in appearance; lose shine or brightness 3. deaden (a sound or noise), especially by wrapping 4. make numb or insensitive 5. make dull or blunt 6. become less interesting or attractive 7. make less lively or vigorous. adj. 1. lacking in liveliness or animation 2. emitting or reflecting very little light 3. being or made softer or less loud or clear 4. so lacking in interest as to cause mental weariness 5. (of color) very low in saturation; highly diluted 6. not keenly felt 7. slow to learn or understand; lacking intellectual acuity 8. (of business) not active or brisk 9. not having a sharp edge or point 10. blunted in responsiveness or sensibility 11. not clear and resonant; sounding as if striking with or against something relatively soft 12. darkened with overcast. 
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1. All work and no play makes Jack a dull boy; all play and no work makes Jack a mere boy. 
2. All work and no play makes Jack a dull boy.
3. The countryside was flat, dull and uninteresting.
4. He had grown staid and dull.
5. His head hit the floor with a dull thud.
6. After a dull start, it should brighten up later.
7. She wrote dull, respectable articles for the local newspaper.
8. The house was dull, old-fashioned and in bad condition.
9. The first half of the game was pretty dull.
10. Her eyes looked dull and sunken.
11. The work gets a bit dull at times.
12. A dull red flush suffused Selby's face.
13. I have a dull pain.
14. I feel a dull ache in the shoulder.
15. Life in a small town could be deadly dull.
16. Robots can relieve people of dull and repetitive work.
17. There's never a dull moment when John's around.
18. Life is never dull when Elizabeth is here.
19. A dull pain began to throb behind his lids.
20. I abhor the dull routine of existence.
21. That was dull, wasn't it?
22. I felt she found me boring and dull.
23. The conference was deadly dull.
24. I am dull of hearing.sentencedict.com/dull.html
25. All work and no play makes jack a dull boy.
26. The room is dull.
27. The book was so dull that I didn't finish it.
28. My life is dull.
29. No, it was dull.
30. It is dull today.
More similar words: adult, schedule, indulge, adultery, modulate, undulant, credulous, pendulum, undulate, on schedule, incredulity, incredulous, indulgent, modulated, adulation, indulgence, fraudulent, adulterate, incredulously, fraudulence, bull, full, mull, pull, Bull., behind schedule, fully, bully, skull, bullet.