Phrase guide

monotone function

noun · 3 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A function f : X→R (where X is a subset of R, possibly a discrete set) that either never decreases or never increases as its independent variable increases; that is, either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x).

Definition source: English Wiktionary via Wiktextract

Topics: calculus, mathematics, sciences

Examples

  • Where defined, the first derivative of a monotone function never changes sign, although it may be zero.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

A function f : X→Y (where X and Y are posets with partial order "≤") with either: (1) the property that x ≤ y implies f(x) ≤ f(y), or (2) the property that x ≤ y implies f(y) ≤ f(x).

Definition source: English Wiktionary via Wiktextract

Topics: mathematical-analysis, mathematics, order-theory, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

3

noun

Meaning 3

A Boolean function with the property that switching any one input variable from 0 to 1 results either in no change in output or a change from 0 to 1.

Definition source: English Wiktionary via Wiktextract

Qualifier: Boolean algebra

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

No etymology was provided for this word.

Across languages

Translations

10 source translations are retained for this English entry.

  • Bulgarian: монотонна функция (monotonna funkcija) — calculus: real function that either never decreases or never increases
  • German: monotone Funktion — calculus: real function that either never decreases or never increases
  • Serbo-Croatian: monotona funkcija — calculus: real function that either never decreases or never increases
  • Spanish: función monótona — calculus: real function that either never decreases or never increases
  • Turkish: monoton fonksiyon — calculus: real function that either never decreases or never increases
  • German: monotone Funktion — order theory: function such that either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x)
  • Serbo-Croatian: monotona funkcija — order theory: function such that either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x)
  • Spanish: función monótona — order theory: function such that either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x)
  • Turkish: monoton fonksiyon — order theory: function such that either x ≤ y implies f(x) ≤ f(y) or x ≤ y implies f(y) ≤ f(x)
  • Bulgarian: монотонна функция (monotonna funkcija) — Boolean function such that switching an input from 0 to 1 either does not change the output or changes it from 0 to 1