PSA

American

abbreviation

prostate specific antigen: a protein, produced by the prostate, elevated levels of which may indicate the presence of cancer.
public service announcement: an audio or video spot or advertisement to educate or promote awareness about health, safety, civics, etc.
positive security assurance.

PSA British

abbreviation

prostatic specific antigen: an enzyme secreted by the prostate gland, increased levels of which are found in the blood of patients with cancer of the prostate
(in New Zealand) Public Service Association

"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

PSA Scientific

Abbreviation of prostatic-specific antigen

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.

In 2021, that company merged with France’s PSA Group to form Stellantis.

From The Wall Street Journal • Apr. 4, 2026

Vir Biotechnology’s VIR-5500 prostate cancer drug shows promising Phase 1 trial results, with 14 of 17 patients achieving at least a 50% PSA reduction.

From Barron's • Feb. 24, 2026

Nine patients showed at least a 90% decrease in PSA.

From Barron's • Feb. 24, 2026

Paul’s card was graded 10 by Professional Sports Authenticators, or PSA, a third-party service that authenticates and grades trading cards and other collectibles.

From Los Angeles Times • Feb. 17, 2026

The same meme makes the rounds every storm: “Tornado season PSA: Bras on, teeth in!”

From "Legendary Frybread Drive-In" by Cynthia Leitich Smith

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023