Synonyms

diehard

American

[dahy-hahrd] / ˈdaɪ hɑrd /

adjective

stubbornly devoted.

noun

plural

diehards

a person who is stubbornly devoted to something, such as a political viewpoint or a particular media property.

Other Word Forms

non-diehard 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.

For Inter Milan that investment, the club hopes, will transform the game-day experience not just for well-heeled corporate types but for the team’s diehard fans.

From Los Angeles Times • Mar. 17, 2026

As for everyone else, including her most diehard critics, she hopes they can still appreciate her fiction.

From The Wall Street Journal • Jan. 31, 2026

The Athletic added in a Friday report that the two negotiators “remain far apart” on their respective demands, frustrating the YouTube TV viewers who make up “some of the most diehard NFL fans anywhere.”

From Slate • Nov. 10, 2025

"I think we had four devices trying to book tickets," Caspar tells the BBC ahead of the event, displaying his sumo towels proudly - a must for diehard fans.

From BBC • Oct. 17, 2025

I imagine that some of you, particularly those who are diehard cola drinkers, are bristling at this point.

From "Blink" by Malcolm Gladwell

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