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