Upper-Intermediate (B2)
IPA: //ˌbaɪkənˈdɪʃənl//
KK: /baɪkənˈdɪʃənl/
Definition
Describing a situation where two conditions must both be true or both be false for a statement to hold true.
Example
In logic, a biconditional statement is true if both parts are either true or false.
Conversation

Have you ever heard of a biconditional statement in math?

Yeah, I think it means both conditions must be true, right?

Exactly! It’s kind of like saying if one thing happens, then the other must happen too.

That makes sense! It’s interesting how logical reasoning works.
Synonyms & Antonyms
Synonyms
conditional
dependent
interdependent
Antonyms
independent
unconditional
absolute
Definition
A type of logical statement that is true when both parts are either true or false at the same time.
Example
In mathematics, a biconditional statement is often used to define equivalence between two conditions.
Conversation

I was reading about logic and came across the term biconditional.

Oh, I think I remember that from class! It's like when two statements depend on each other, right?

Exactly! It’s an "if and only if" situation, which is kind of fascinating.
Root Explanation
Biconditional → It is formed from "bi-" (meaning two) and "conditional" (from Latin "conditio", meaning condition). The word refers to a logical statement that is true if both conditions are either true or false, hence involving two conditions.
Memory Tip
Think of 'two' ('bi-') conditions that must be true or false together — that's what biconditional means.
Visually Confused Words
conditional
unconditional
conditionally
indictional
cognitional
condition
inconditionate
conditionalize