Definition of mind-expander in English:

mind-expander

noun

  • Something that expands or (apparently) extends the capabilities of the mind; specifically a psychedelic drug.

Pronunciation

mind-expander

/ˈmʌɪndɪkˌspandə/ /ˈmʌɪndɛkˌspandə/

Origin

Late 19th century; earliest use found in Popular Science Monthly. From mind + expander, after mind-expanding.