Meaning & Definition
noun
The twenty-third letter of the Greek alphabet (Ψ, ψ), used in various scientific contexts including physics, psychology, and sociology.
In quantum mechanics, the wave function is often represented using the Greek letter psi.
A unit of pressure equal to one pound per square inch, commonly used in various applications, including tire pressure and fluid dynamics.
The recommended tire pressure for the vehicle is 32 psi.
In parapsychology, 'psi' refers to purported psychic phenomena such as telepathy, clairvoyance, and psychokinesis.
The researcher conducted experiments to investigate the existence of psi effects among the participants.
Etymology
From Greek 'psi', the name of the 23rd letter of the Greek alphabet.
Common Phrases and Expressions
psi phenomenon:
Refers to a range of psychic experiences and effects.
psi research:
The scientific study of psychic phenomena.
psi abilities:
Skills believed to involve psychic powers.
Slang Meanings
Unexplained or supernatural occurrences.
That ghost sighting was total psi.
A person believed to have psychic abilities.
She's a real psi; she can predict the future!