© 2026 Sloth Lingo. Learn easy. Lounge wisely.

bijection

Upper-Intermediate (B2)

IPA: //baɪˈdʒɛkʃən//

KK: /baɪˈdʒɛkʃən/

noun
Definition

A type of function in mathematics where each input is paired with exactly one unique output, and every possible output is paired with an input.


Example

In mathematics, a bijection ensures that every element in the first set corresponds to one and only one element in the second set.


Conversation
Sloth A
Have you ever heard of the term bijection in math?
Sloth B
Yeah, it’s about functions being one-to-one and onto, right?
Sloth A
Exactly! I find it fascinating how it relates to different mathematical concepts.
Sloth B
Totally! Understanding bijection really helps in advanced math.

Synonyms & Antonyms
Synonyms
mapping
correspondence
function
Antonyms
nonmapping
disjunction
injection
Root Explanation

Bijection → It is formed from "bi-" (meaning two) and "jectio" (from "jacere", meaning to throw). The term describes a function that pairs each element of one set with exactly one element of another set, thus creating a two-way correspondence.

Memory Tip

Think of 'two' ('bi-') things being 'thrown' together ('jectio') in a way that matches each one perfectly.

Visually Confused Words
objection
injection
bisection
abjection
subjection
disjection
ejection
objectioner
Is this page helpful?