Definition of I-ism in US English:

I-ism

noun

  • (A) Metaphysics the reference of all things to one's own consciousness, egoism. (b) nonce-wd. The frequent use of ‘I’, egotism of style.

Origin

Mid 19th century; earliest use found in Fraser's Magazine for Town and Country. From I + -ism.

Pronunciation

I-ism

/ˈʌɪɪz(ə)m/