Logo
dictionary thesaurus

psi

noun (1)
\ ˈsī How to pronounce psi (audio) , ˈpsī How to pronounce psi (audio) \

Definition of psi

 (Entry 1 of 3)

: the 23rd letter of the Greek alphabet — see Alphabet Table

psi

noun (2)
\ ˈsī How to pronounce psi (audio) \

Definition of psi (Entry 2 of 3)

: parapsychological psychic phenomena or powers

psi

abbreviation

Definition of psi (Entry 3 of 3)

pounds per square inch

First Known Use of psi

Noun (1)

15th century, in the meaning defined above

Noun (2)

1942, in the meaning defined above

History and Etymology for psi

Noun (1)

Middle English, from Medieval Latin, from Late Greek, from Greek psei

Noun (2)

probably by shortening & alteration from psychic

Keep scrolling for more

Keep scrolling for more

More Definitions for psi

psi

adjective
\ ˈsī How to pronounce psi (audio) \

Medical Definition of psi

 (Entry 1 of 2)

: relating to, concerned with, or being parapsychological psychic events or powers psi phenomena

psi

noun

Medical Definition of psi (Entry 2 of 2)

: psi events or phenomena

WORD OF THE DAY

verbose

play

See Definitions and Examples

Get Word of the Day daily email!