[{"Bold_text": "verb (used with object)", "List Items": ["to discover or catch (a person) in the performance of some act:to detect someone cheating.", "to discover the existence of:to detect the odor of gas.", "to find out the true character or activity of:to detect a spy.", "Telecommunications.to rectify alternating signal currents in a radio receiver.to demodulate.", "to rectify alternating signal currents in a radio receiver.", "to demodulate."]}]