Definition of mind expansion in English:

mind expansion

Pronunciation /ˈmʌɪnd ɪkˌspanʃn/ /ˈmʌɪnd ɛkˌspanʃn/

noun

  • The action of expanding or (apparently) extending the capabilities of the mind. Also: specifically the action of experiencing the effects of (especially psychedelic) drugs.

Origin

1960s; earliest use found in Journal Human Health & Social Behavior. From mind + expansion, after mind-expanding.