Definition of malform
: to cause to be badly or imperfectly formed : cause to be formed in such a way as to deviate from the normal or usual : give an abnormal, anomalous, or otherwise irregular and defective formation or structure to a virus that malforms tobacco leaves in his chair sat a personality malformed beyond decency by greed and pride — Clemence Dane
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Origin and Etymology of malform
1mal- + form, verb
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