# lumpy

/ˈɫəmpi/ (US) · /lˈʌmpi/ (UK) · CEFR B1 · Adjective

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

## Definition

having many small, hard bumps on the surface. You use this to describe things like skin, food, or even a mattress that feels uneven.

For teachers: having an uneven or bumpy surface consisting of small, hard masses. Often used to describe physical textures or the appearance of skin and food.

## Examples

- The cake is lumpy because I didn't mix the batter well.
- The old mattress was so lumpy that I could feel every bump through my thin sheets.
- The surface of the moon is famously lumpy, featuring a landscape of craters and ridges that make it appear far more rugged than Earth's oceans.

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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.