Definition of -ism in English:

-ism

Pronunciation: /ɪz(ə)m/

suffix

Forming nouns:
1Denoting an action or its result: baptism exorcism
1.1Denoting a state or quality: barbarism
3Denoting a peculiarity in language: colloquialism Americanism

Origin

from French -isme, via Latin from Greek -ismos, -isma.

Definition of -ism in:

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Word of the day oleaginous
Pronunciation: ˌōlēˈajənəs
adjective
rich in, covered with, or producing oil; oily