What does PSI mean?

Definitions for PSIsaɪ, psaɪ

Here are all the possible meanings and translations of the word PSI.

Princeton's WordNet

  1. pounds per square inch, psi(noun)

    a unit of pressure

  2. psi(noun)

    the 23rd letter of the Greek alphabet


  1. Psi

    Psi is the 23rd letter of the Greek alphabet and has a numeric value of 700. In both Classical and Modern Greek, the letter indicates the combination /ps/. For Greek loanwords in Latin and modern languages with Latin alphabets, psi is usually transliterated as "ps". In English, due to phonotactic constraints, its pronunciation is usually simplified to /s/ at the beginning of a word. Historically, the letter is a Greek innovation and not derived from the Phoenician alphabet. It appears in the 7th century BC, expressing /ps/ in the Eastern alphabets, but /kʰ/ in the Western alphabets. Epigraphically, the early letter appears in an angular shape. There were early graphical variants which omitted the stem. The Western letter was adopted into the Old Italic alphabets, and its shape is also continued into the Algiz rune of the Elder Futhark. The classical Greek letter was adopted into the early Cyrillic alphabet as "Ѱ".

Suggested Resources

  1. psi

    The psi symbol -- In this Symbols.com article you will learn about the meaning of the psi symbol and its characteristic.

  2. PSI

    What does PSI stand for? -- Explore the various meanings for the PSI acronym on the Abbreviations.com website.

Anagrams for PSI »

  1. IPS, IPs, ISP, pis, sip


  1. Chaldean Numerology

    The numerical value of PSI in Chaldean Numerology is: 3

  2. Pythagorean Numerology

    The numerical value of PSI in Pythagorean Numerology is: 8

Sample Sentences & Example Usage

  1. Cornel Marculescu:

    In the event that the 3-hour PSI reading exceeds 200, and enters the very unhealthy range, no races will take place.

  2. Henry Crochiere:

    The Inter-Fraternity Council acknowledges that the theme, while not overtly reprehensible, is potentially offensive to members of the community, as a result, we thought it was best to end the party and other Delta Psi events planned for the weekend in order to reevaluate the situation.

  3. Ang Peng Wee:

    With the haze caused by the fires in Indonesia, the health and safety of all athletes, guests, officials, spectators, volunteers and staff remain as our top priority, hence, with the deteriorating 3-hr PSI reading, we have made the decision to cancel the finals scheduled for 6pm this evening.

  4. Deborah Zandstra:

    Lazard advised on the Greek PSI [private sector involvement] so there is some continuity of approach. That said I'd expect them to amend their approach to reflect the objectives of the new Greek government, from their work in 2012 they will know the people involved there and at the euro zone working group and ECB (European Central Bank).

Images & Illustrations of PSI


Translations for PSI

From our Multilingual Translation Dictionary

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"PSI." Definitions.net. STANDS4 LLC, 2018. Web. 23 Feb. 2018. <https://www.definitions.net/definition/PSI>.

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