Longman Dictionary of Contemporary English homepage

pathological

adjective
     
path‧o‧log‧i‧cal
1 pathological behaviour or feelings happen regularly, and are strong, unreasonable, and impossible to control:
a pathological hatred of women
a pathological liar
2MPMI a mental or physical condition that is pathological is caused by disease:
3MI relating to pathology
pathologically adverb:
Stephen was almost pathologically jealous of his brother.

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