[{"Bold_text": "verb (used without object)", "List Items": ["to utter a low, continuous, murmuring sound expressive of contentment or pleasure, as a cat does.", "(of things) to make a sound suggestive of the purring of a cat:The new motor of the car purred."]}, {"Bold_text": "verb (used with object)", "List Items": ["to express by or as if by purring."]}, {"Bold_text": "noun", "List Items": ["the low, vibrating sound made by a cat by the contracting of the laryngeal muscles and the diaphragm as it breathes.", "a sound resembling this.", "the act of purring."]}]