pacepacepacespacedpacing2verbto walk around nervously or angrily: She paced up and down outside.pacepacepaces1noun1(no plural) how fast you do something or how fast something happens: We started at a steady pace.2(pluralpaces) a step: Take two paces forward.keep pace with somebodyor somethingto go as fast as somebody or something: She couldn't keep pace with the other runners.