# flatness

> English word · Noun · IPA /ˈflætnəs/ · frequency rank #58,695

## Definitions
1. The state of being flat
2. The state of being two-dimensional; planar : planarity
3. The state of being bland : dullness
4. Mattness, the quality of a painted surface which scatters or absorbs the light falling on it, so as to be substantially free from gloss or sheen
5. Lack of bouquet and freshness of a wine, through too much aeration or infection with film yeasts
6. slim-tailedness or platykurtosis.

## Etymology
From Middle English flatnesse, equivalent to flat + -ness.

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