# smoothness

/ˈsmuðnəs/ (US) · /smˈuːðnəs/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/smoothness
Updated: 2026-05-20

## Definition

the quality of being flat, even, and free of any rough or bumpy parts. You use this to describe things like a surface, a voice, or a ride.

For teachers: the quality of being free from irregularities, bumps, or roughness. Often used to describe physical surfaces, vocal tones, or the flow of a process.

## Examples

- The smoothness of the marble floor makes it easy to clean.
- The pilot praised the smoothness of the flight, noting that there were no sudden bumps or turbulence.
- The artisan's skill is evident in the smoothness of the pottery, which feels perfectly even to the touch despite the complex patterns etched into the surface.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.