replacereplacereplacesreplacedreplacingverb (replaces, replacing, replaced)1to take the place of somebody or something: Teachers will never be replaced by computers in the classroom.2to put a new or different person or thing in the place of another: The watch was broken so the shop replaced it with a new one.3to put something back in the place where it was before: Please replace the books on the shelf when you have finished with them.