Definitions for "ABNORMAL"
Not conforming to standard. In matters of thought and conduct, to be independent is to be abnormal, to be abnormal is to be detested. Wherefore the lexicographer adviseth a striving toward the straiter [sic] resemblance of the Average Man than he hath to himself. Whoso attaineth thereto shall have peace, the prospect of death and the hope of Hell.
Not conformed to rule or system; deviating from the type; anomalous; irregular.
Not normal. An abnormal lesion or growth may be cancerous, premalignant (likely to become cancer), or benign.
Keywords:  biology
Any change from the 'correct' or 'usual'. It may not necessarily mean harmful or undesirable; it can equally mean atypical, unusual or uncommon. When used in reference to genes, an abnormal gene may result in a specific disorder.
adj. Not conformed to the ordinary rule or standard.
Contrary to the general rule.
different from the average; inappropriate with regard to the standards of society, social role or the existing set of circumstances.