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psi
1[ sahy, psahy ]
/ saɪ, psaɪ /
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noun, plural psis.
the 23rd letter of the Greek alphabet (Ψ, ψ).
the group of consonant sounds represented by this letter.
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Origin of psi
11350–1400; Middle English <Greek pseî
Words nearby psi
Other definitions for psi (2 of 3)
psi2
[ sahy ]
/ saɪ /
noun
any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like.
Compare pseudoscience, parapsychology.
Origin of psi
21940–45; shortening of psychic or parapsychic
Other definitions for psi (3 of 3)
psi
or p.s.i.
pounds per square inch.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use psi in a sentence
British Dictionary definitions for psi (1 of 2)
psi1
abbreviation for
pounds per square inch
British Dictionary definitions for psi (2 of 2)
psi2
/ (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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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