CEFR C1

psi

noun

Meaning

The 23rd letter of the Greek alphabet (Ψ, ψ), used in English to represent a paranormal or psychic phenomenon, or as a symbol in psychology and physics.

Examples

  • The psychologist used the Greek letter psi to represent the mind.
  • Researchers studied the effects of psi on human perception.

Synonyms: letter, symbol, character, sign