Dictionary

-ism

noun suffix

: the act, practice, or process of doing something

: behavior like that of a specified kind of person or thing

: unfair treatment of a group of people who have a particular quality

Full Definition of -ISM

1
a :  act :  practice :  process <criticism> <plagiarism>
b :  manner of action or behavior characteristic of a (specified) person or thing <animalism>
c :  prejudice or discrimination on the basis of a (specified) attribute <racism> <sexism>
2
a :  state :  condition :  property <barbarianism>
b :  abnormal state or condition resulting from excess of a (specified) thing <alcoholism> or marked by resemblance to (such) a person or thing <giantism>
3
a :  doctrine :  theory :  religion <Buddhism>
b :  adherence to a system or a class of principles <stoicism>
4
:  characteristic or peculiar feature or trait <colloquialism>
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Origin of -ISM

Middle English -isme, from Middle French & Latin; Middle French, partly from Latin -isma (from Greek) & partly from Latin -ismus, from Greek -ismos; Greek -isma & -ismos, from verbs in -izein -ize
-ISM Defined for Kids

-ism

noun suffix \ˌi-zəm\

Definition of -ISM for Kids

1
:  act :  practice :  process <baptism> <criticism>
2
:  manner of action or behavior like that of a specified person or thing <heroism>
3
:  state :  condition <alcoholism>
4
:  teachings :  theory :  system <socialism>
Medical Dictionary

-ism

noun suffix \ˌiz-əm\

Medical Definition of -ISM

1
:  act, practice, or process <hypnotism>
2
a :  state, condition, or property <heterothallism> b :  abnormal state or condition resulting from excess of a (specified) thing or marked by resemblance to a (specified) person or thing <alcoholism> <morphinism> <mongolism>

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