1. a continuous deep, resonant sound
2. a sign of discontent or unrest
Usage: often plural

1. making a continuous deep, resonant sound

Examples

• The rumbling of thunder filled the night sky.
• We heard the rumbling of the subway train below.
• There were rumblings of discontent among the workers.
• His stomach made a loud rumbling sound.
• The rumbling volcano worried nearby residents.
• Political rumblings suggested changes were coming.
• The rumbling truck passed by our house.