PSA

American  

abbreviation

1. prostate specific antigen: a protein, produced by the prostate, elevated levels of which may indicate the presence of cancer.

2. public service announcement: an audio or video spot or advertisement to educate or promote awareness about health, safety, civics, etc.

3. positive security assurance.

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PSA British  

abbreviation

1. 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

2. (in New Zealand) Public Service Association

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PSA Scientific  

1. Abbreviation of prostatic-specific antigen

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Example Sentences

Under the terms of the deal, National Storage Affiliates shareholders will receive 0.14 PSA shares.

From Barron's • Mar. 16, 2026

In a Phase 1 trial, 14 of 17 patients showed at least a 50% reduction in prostate-specific antigen, or PSA, a protein that indicates the presence of prostate cancer at elevated levels.

From Barron's • Feb. 24, 2026

According to Goldin, the auction house that organized the trading card auction, Paul’s is the only Pikachu Illustrator card to achieve that “virtually perfect” PSA grading.

From Los Angeles Times • Feb. 17, 2026

Sam had flown with PSA Airlines, a subsidiary of American Airlines, for about two years before the crash.

From The Wall Street Journal • Feb. 14, 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