Monotone refers to a sound, for example music or speech, that has a single unvaried tone. See pure tone and monotonic scale.

Monotone or monotonicity may also refer to:

In economics

  • Monotone preferences, a property of a consumer's preference ordering.
  • Monotonicity (mechanism design), a property of a social choice function.
  • Monotonicity criterion, a property of a voting system.
  • Resource monotonicity, a property of resource allocation rules and bargaining systems.

In mathematics

  • Monotone class theorem, in measure theory
  • Monotone convergence theorem, in mathematics
  • Monotone polygon, a property of a geometric object
  • Monotonic function, a property of a mathematical function
  • Monotonicity of entailment, a property of some logical systems
  • Monotonically increasing, a property of number sequence

Other uses

  • Monotone (software), an open source revision control system
  • Monotonic orthography, simplified spelling of modern Greek
  • The Monotones, 1950s American rock and roll band
  • Quantifier monotonicity, in formal semantics
  • "Monotone" (song), a song by Yoasobi for 2024 animated film Fureru
  • "Monotone", a song by American alternative rock band Splender