[{"Bold_text": "noun", "List Items": ["any of a class of heavier-than-air craft that are lifted and sustained in the air horizontally by rotating wings or blades turning on vertical axes through power supplied by an engine."]}, {"Bold_text": "verb (used without object)", "List Items": ["to fly in a helicopter."]}, {"Bold_text": "verb (used with object)", "List Items": ["to convey in a helicopter."]}]