Dictionary.com
Thesaurus.com

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.

Polymarket invited a delegation of fraternity brothers from Columbia University’s Sigma Phi Epsilon chapter to visit the company’s Manhattan headquarters on Nov. 16.

From The Wall Street Journal • Mar. 6, 2026

Even into my adulthood he suggested I display it in my office alongside my Phi Beta Kappa parchment so that visitors could assess my character as well as my academic achievements.

From The Wall Street Journal • Feb. 4, 2026

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

Mr Shields said the campus chapter of Omega Psi Phi has been ordered to suspend all activities.

From BBC • Mar. 8, 2025

Howard University is an institution of higher education, concerned with the LSAT, magna cum laude, and Phi Beta Kappa.

From "Between the World and Me" by Ta-Nehisi Coates

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "phi" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com