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# bumpiness

noun (bumpiness — uncountable)

«bumpiness» in the English dictionary: everyday — its meanings, how the lessons use it, and examples, each with its tree on Mova.

## Everyday

1. Bumpiness is how bumpy something is: how many lumps, holes or rough parts a surface has. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#m1)
2. Bumpiness is also the feeling of being shaken up and down, like on a rough road, a bumpy flight or a choppy boat ride. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#m2)

### In the lessons

In science and maths it describes how rough or smooth a surface is, for example when testing how far a toy car rolls on carpet, sand or a smooth floor (more bumpiness means more friction). In everyday life it describes rough journeys. Phrases: the bumpiness of the road, a bit of bumpiness.

### Examples

- The bumpiness of the old track made the bike rattle. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x1)
- The pilot said to expect some bumpiness during the flight. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x2)
- We measured how the bumpiness of the surface changed how far the car rolled. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x3)
- The bumpiness of the lane made Dad drive very slowly. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x4)
- Sandpaper has more bumpiness than glass, so there is more friction. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x5)
- The baby slept through all the bumpiness of the bus ride. [tree →](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/#x6)

### Note

Uncountable: no plural, no «a» (say «some bumpiness» or «the bumpiness»). Made from bumpy + -ness; the y changes to i: bumpiness. Opposite: smoothness. On planes the proper word for bumpiness is turbulence.

## On Mova

- [Trees and pragmatics of «bumpiness» in the school dictionary](https://mova.elamur.ai/free/en/corpora/dictionaries/school/B/bumpiness/): every meaning and example parsed by Mova, with its dependency tree and frames.
- [«bumpiness» in the school dictionary](https://mova.elamur.ai/free/en/dictionaries/school/w/bumpiness.html) on Mova free.