DECREPIT Meaning of DECREPIT in English adj. 1 weakened or worn out by age and infirmity. 2 worn out by long use; dilapidated. decrepitude n.[ ME f. L decrepitus (as DE-, crepitus past part. of crepare creak) ] Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012