To direct the course of; manage or control. To lead or guide. See Synonyms at accompany. Music To lead (an orchestra, for example). To serve as a medium for conveying; transmit: Some metals conduct heat. To comport (oneself) in a specified way: She conducted herself stoically in her time of grief. To act as a conductor. To lead. The way a person acts, especially from the standpoint of morality and ethics. The act of directing or controlling; management. Obsolete A guide; an escort.