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Abnormal vs Atypical vs Aberrant

Abnormal, atypical and aberrant all mean deviating markedly from the rule or standard of its kind.

Abnormal frequently suggests strangeness and sometimes deformity or monstrosity.

  • Tests revealed some abnormal skin cells.

Atypical stresses divergence upward or downward from some established norm.

  • The sociable behaviour of lions is considered atypical of the cat family.

Aberrant implies a departure from the usual or natural type.

  • Ian's rages and aberrant behavior worsened.