# monoplane

> English word · Adjective · frequency rank #86,529

## Definitions
1. Composed of, or relating to, a single plane (flat surface extending infinitely in all directions).

## Etymology
From mono- + plane. The aviation sense was formed by analogy with biplane; compare French monoplan, as well as the earlier English aeroplane, multiplane, and triplane.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/monoplane