-ism /ɪzəm/ suffix [in nouns]
[Language: French; Origin: -isme, from Latin -isma and -ismus, from Greek -isma and -ismos, from verbs ending in -izein; ⇒ -ize]

1. a political belief or religion based on a particular principle or the ideas and beliefs of a particular person:
socialism
Buddhism

2. the action or process of doing something:
his criticism of my work

3. an action or remark that has a particular quality:
her witticisms (=funny remarks)

4. the state of being like something or someone, or having a particular quality:
heroism (=being a hero; bravery)
magnetism (=being magnetic)

5. illness caused by too much of something:
alcoholism

6. the practice of treating people unfairly because of something:
sexism (=making unfair differences between men and women)
racism

[TahlilGaran] Dictionary of Contemporary English ▲

is‧m /ˈɪzəm/ noun [countable] informal
[Date: 1600-1700; Origin: -ism]
used to describe a set of ideas or beliefs whose name ends in ‘ism’, especially when you think that they are not sensible or practical

[TahlilGaran] Dictionary of Contemporary English ▲

ISM
Industrial Security Manual (DOD 5220.22-M) 
International Symposium on Microarchitecture

[TahlilGaran] Acronyms and Abbreviations Dictionary ▲