psi
1
[ sahy, psahy ]
/ saɪ, psaɪ /
noun, plural psis.
the 23rd letter of the Greek alphabet (Ψ, ψ).
the group of consonant sounds represented by this letter.
Origin of psi
1
1350–1400; Middle English < Greek
pseî
Words nearby psi
pseudovector,
pseudoxanthoma elasticum,
psf,
psg,
pshaw,
psi,
psi particle,
psi phenomenon,
psia,
psid,
psig
Definition for psis (2 of 2)
psi
2
[ sahy ]
/ saɪ /
noun
any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like.
Compare
pseudoscience,
parapsychology.
Origin of psi
2
1940–45; shortening of
psychic or
parapsychic
Example sentences from the Web for psis
British Dictionary definitions for psis (1 of 3)
PSIS
abbreviation for (in New Zealand)
Public Service Investment Society, New Zealand's largest credit union
British Dictionary definitions for psis (2 of 3)
psi
1
abbreviation for
pounds per square inch
British Dictionary definitions for psis (3 of 3)
psi
2
/ (psaɪ) /
noun
the 23rd letter of the Greek alphabet (Ψ, ψ), a composite consonant, transliterated as ps
- paranormal or psychic phenomena collectively
- (as modifier)psi powers
Medical definitions for psis
psi
[ sī, psī ]
n.
The 23rd letter of the Greek alphabet.