Definition of looper
1 : any of the usually rather small hairless caterpillars that are mostly larvae of moths (families Geometridae and Noctuidae) and move with a looping motion in which the hind prolegs draw the posterior body toward the front followed by forward extension by the anterior legs —called also inchworm
2 : one that loops
First Known Use of looper
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Britannica.com: Encyclopedia article about "looper"
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