Meaning

• A low thundering, rumbling or growling sound.

• The sound made by a hungry stomach.

• A surly complaint.

  "That whiner is never without a grumble to share."

Meaning

• To make a low, growling or rumbling noise, like a hungry stomach or certain animals.

  "The distant thunder grumbles."

• To complain; to murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner.

  "He grumbles about the food constantly, but has yet to learn to cook."

• To utter in a grumbling fashion.