[{"Bold_text": "verb (used without object)", "List Items": ["to utter a deep guttural sound of anger or hostility:The dog growled at the mail carrier.", "to murmur or complain angrily; grumble.", "to rumble:The thunder growled.", "Jazz.to use flutter-tonguing in playing a wind instrument."]}, {"Bold_text": "verb (used with object)", "List Items": ["to express by growling."]}, {"Bold_text": "noun", "List Items": ["the act or sound of growling.", "Jazz.the technique of flutter-tonguing."]}]