Dictionary.com
Thesaurus.com

ideologue

American  
[ahy-dee-uh-lawg, -log, id-ee-, ahy-dee-] / ˈaɪ di əˌlɔg, -ˌlɒg, ˈɪd i-, aɪˈdi- /

noun

  1. a person who zealously advocates an ideology.


Etymology

Origin of ideologue

1805–15; < French idéologue; see ideo-, -logue

Explanation

An ideologue is someone who has very strong beliefs or opinions and stubbornly sticks to them no matter what. An ideologue will insist they're right even when evidence suggests they might be wrong. If you call someone an ideologue, it's an insult. You're not just saying they believe in something, but that their belief is unreasonable and unbending. An ideologue can't have a thoughtful discussion about a topic, and they aren’t able to consider other perspectives. Ideologue derives from the Greek idea, "form," and logos, "word or speech."

Keep Reading on Vocabulary.com

Vocabulary lists containing ideologue

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.

Rubio, who is seen as less of an ideologue, will lead the US delegation to the annual security and defense talks, which run through Sunday in the Bavarian capital.

From Barron's • Feb. 12, 2026

Crooks reportedly went from being a pro-Trump to an anti-Trump ideologue, but appeared to go dark online afterward.

From Salon • Nov. 19, 2025

Mr. Howard’s argument, which I find persuasive, is that Cowley’s stint as an ideologue was a short-term folly that does not fundamentally implicate his literary endeavors.

From The Wall Street Journal • Nov. 7, 2025

They say it is "another unsurprising exit" and describe Kruger as "impossible" and an "ideologue".

From BBC • Sep. 15, 2025

He was not an ideologue, but a pragmatist, a man who saw change as necessary and inevitable.

From "Long Walk to Freedom" by Nelson Mandela