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phi

American  
[fahy] / faɪ /

noun

phis plural
  1. the 21st letter of the Greek alphabet (Φ, φ).

  2. the consonant sound represented by this letter.


phi British  
/ faɪ /

noun

  1. the 21st letter in the Greek alphabet (Φ, φ), a consonant, transliterated as ph or f

"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

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Noun Inflected Forms

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

If phi mesons can add to the strong force field, their cousins should, too—and J/psi mesons’ spin polarizations should be similarly impacted by the resulting fluctuations.

From Scientific American Feb. 2, 2023

Alpha, beta, upsilon, phi / Tuition here is too damn high!

From Washington Times Dec. 26, 2019

Having seen the alpha and omega of the series, I'm eager to see the gamma, delta, epsilon and phi, or whichever intermediate Greek letters you want to represent those four other episodes.

From Los Angeles Times Feb. 13, 2019

In modern Greek, phi sounds like “f,” but it is usually transliterated from ancient Greek as “ph.”

From The New Yorker Jan. 7, 2019

It likewise appears that the Romans were for a long period unacquainted with the use of aspirates, and were destitute of the phi and chi sounds of the Greek alphabet.

From History of Roman Literature from its Earliest Period to the Augustan Age. Volume I by Dunlop, John

Literally full of sigmas, phis, omegas and other symbols.

From Washington Times Apr. 7, 2020

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