a mark against a person for misconduct or deficiency: If you receive four demerits during a term, you will be expelled from school.
2.
the quality of being censurable or punishable; fault; culpability.
3.
Obsolete. merit or desert.
Origin: 1350–1400; ME (< OF desmerite) < ML dēmeritum fault, n. use of neut. ptp. of L dēmerēre to earn, win the favor of (dē- taken in ML as privative, hence pejorative). See de-, merit
A quality or characteristic deserving of blame or censure; a fault.
Absence of merit.
A mark made against one's record for a fault or for misconduct.
[Middle English demerite, offense, from Old French desmerite, from Latin dēmeritum, from neuter past participle of dēmerēre, to deserve : dē-, de- + merēre, to earn; see (s)mer-2 in Indo-European roots.] de·mer'i·to'ri·ous (-tôr'ē-əs, -tōr'-) adj., de·mer'i·to'ri·ous·ly adv.