1. (

• rumble ,
• rumbling ,
• grumble ,
• grumbling

) a loud low dull continuous noise; "they heard the rumbling of thunder" ;

1. (

• rumble ,
• grumble

) make a low noise; "rumbling thunder" ;

2. (

• grumble ,
• growl ,
• rumble

) to utter or emit low dull rumbling sounds; "he grumbled a rude response"; "Stones grumbled down the cliff" ;

1. (

• grumbling ,
• rumbling

) continuous full and low-pitched throbbing sound; "the rumbling rolling sound of thunder" ;