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         Definitions from WordNet
Noun rumbling has 1 sense
rumble, rumbling, grumble, grumbling - a loud low dull continuous noise; "they heard the rumbling of thunder"--1 is a kind of noise
 
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| Definitions from the WebRumblings
  Noun:
    A low, deep, and distant sound or series of sounds, often indicating the presence of something powerful or threatening. Verb (present participle):
    Producing a low, deep, and continuous sound. Noun:
    Grumblings or murmurs of discontent, dissatisfaction, or unrest within a group or organization.This sense is often used in a metaphorical or figurative context. Related Products on Amazon: Sample Sentences:
  The rumblings of thunder warned us of an approaching storm.The volcano emitted deep rumblings, indicating an imminent eruption.The machine began rumbling as it fired up.There were rumblings of discontent among the employees after the company announced pay cuts.His speech sparked rumblings of dissent among the crowd. |