The term 'in reverse' can be defined in several ways. The crossword solutions for this term are 'ABOUT, ' 'BACKWARD, ' 'BACK, ' and 'ASTERN.' 'ABOUT' is a preposition meaning 'CONCERNING' or 'on the subject of.' 'BACKWARD' is an adverb meaning 'in a direction opposite to the usual one.' 'BACK' is an adverb meaning 'in or to a former place or position.' Lastly, 'ASTERN' is an adverb meaning 'toward or in the rear of a ship.' All of these words refer to the idea of moving in a direction opposite to the usual one.