Definition

A person who holds beliefs or ideas that are not based on reason or logic, often rejecting rational thought.

Example

The irrationalist refused to accept scientific evidence, believing instead in unfounded theories.

Conversation

I read an article about an irrationalist who believes in some wild conspiracy theories.

Really? Some people take those ideas way too far.

Yeah, it's strange how they reject logic completely.

I know, it's like they prefer to trust their gut over facts.

Synonyms & Antonyms

Root Explanation

Irrationalist → It is formed from "ir-" (meaning not) and "rational" (from Latin "rationalis", meaning reasonable or logical) and the suffix "-ist" (meaning one who practices or is concerned with). The word describes a person who does not adhere to reason or logic.

Memory Tip

Think of someone who is 'not' ('ir-') 'reasonable' ('rational') — that's why an irrationalist is someone who does not follow logical reasoning.

Visually Confused Words