A co-imitator, someone who joins with others in following the same example. Paul exhorts the Philippians in 3:17 to 'become fellow imitators of me' and to observe those who walk according to the pattern he and his companions provide. The word emphasizes communal mimicry—not solitary copying but shared modeling that creates a community shaped by common examples. In ancient educational culture, imitation of models was central to moral formation. Paul calls believers to imitate him together as he imitates Christ.