psi: Meaning and Definition of
Pronunciation: (sī, psī), [key]
— pl. psis.
- the 23rd letter of the Greek alphabet (&PSgr;, &psgr;).
- the group of consonant sounds represented by this letter.
Pronunciation: (sī), [key]
- any purportedly psychic phenomenon, as psychokinesis, telepathy, clairvoyance, or the like. Cf.
- pounds per square inch.
- psi (Thesaurus)