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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

Other Word Forms

Inflected Forms

noun

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.

He graduated from The College of William and Mary, where he was elected to Phi Beta Kappa.

From The Wall Street Journal • Jan. 19, 2026

Mr. Heitman is a columnist for the Baton Rouge Advocate and the editor of Phi Kappa Phi’s Forum magazine.

From The Wall Street Journal • Dec. 11, 2025

The Pepperdine seniors and members of the Alpha Phi sorority subsequently received their degrees posthumously.

From Los Angeles Times • Nov. 10, 2025

Her passion for community building is showcased through her commitment to her Latina-based sorority, Phi Lambda Rho Sorority Inc., aiming to preserve the retention of Latinas in higher education.

From Los Angeles Times • May 27, 2025

He was offered membership in Phi Beta Kappa but declined, insisting that titles and honors are irrelevant.

From "Into the Wild" by Jon Krakauer

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