- the 23rd letter of the Greek alphabet (Ψ, ψ).
- the group of consonant sounds represented by this letter.
Origin of psi1
1350–1400; Middle English < Greek pseî
- any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like.
Origin of psi2
1940–45; shortening of psychic or parapsychic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for psis
"You'd sure look silly if all the Psis in town blackballed you," I snarled at him.
"Nobody forced her to associate with a gang of Psis," he said.
Crescas appeared as if by magic—Psis act like that—and had me by the arm.
His black eyes had that lively watchfulness you associate with Psis.
Their attire, their homes, everything about Psis, seems tasteful.
- Public Service Investment Society, New Zealand's largest credit union
- pounds per square inch
- 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 Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for psis
23rd letter of the Greek alphabet. Use for "psychic force, paranormal phenomenon" dates from 1942 (probably from psychic (adj.)).
Online Etymology Dictionary, © 2010 Douglas Harper
- The 23rd letter of the Greek alphabet.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.