Dictionary.com
Thesaurus.com
Synonyms

supremacy

American  
[suh-prem-uh-see, soo-] / səˈprɛm ə si, sʊ- /

noun

  1. the state of being supreme.

  2. supreme authority or power.


supremacy British  
/ sʊˈprɛməsɪ, sjʊ- /

noun

  1. supreme power; authority

  2. the quality or condition of being supreme

"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

Etymology

Origin of supremacy

First recorded in 1540–50; supreme + -acy

Explanation

Supremacy is the state of having the ultimate authority. A ruling king has supremacy over his kingdom. When one group dominates another, it has supremacy. One country's army might have military supremacy over another, or your favorite baseball team might gain supremacy in the third game of the World Series, meaning it has power over the other team in the series. Supremacy comes from the Latin word supremus, which means highest.

Keep Reading on Vocabulary.com

Vocabulary lists containing supremacy

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.

But there’s still the Supremacy Clause of the Constitution, which gives the federal government authority over immigration.

From The Wall Street Journal • Jan. 19, 2026

Craig Williams, who rode Vow And Declare to victory in 2019, will take the reins of joint-third favourite Buckaroo while Robbie Dolan, who won last year on rank outsider Knight's Choice, is on-board Royal Supremacy.

From Barron's • Nov. 3, 2025

That’s Supremacy Clause 101: When a federal law conflicts with a state law, the federal law preempts the state law.

From Slate • Apr. 22, 2024

To obtain immunity, he would need to show that his conduct served some actual U.S. government purpose that the Supremacy Clause would forbid the state from annulling.

From Los Angeles Times • Aug. 31, 2023

He forced the Government to pass the Act of Supremacy as a defence against treason, and was thus the cause also of the execution of Sir Thomas More and the Charterhouse Monks.

From The Divorce of Catherine of Aragon The Story as Told by the Imperial Ambassadors Resident at the Court of Henry VIII by Froude, J.A.

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

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

Take me to Vocabulary.com