# compact

/ˈkɑmpækt/ (US)

Source: https://englishreference.com/word/compact
Updated: 2026-06-19

## Senses

### 1. small and space-efficient

adjective · CEFR B1

small and designed to fit into a little space.

For teachers: having all necessary features or parts fitting neatly into a small volume or space.

- The new laptop is very compact and fits easily into my backpack.
- The architect designed a compact living area that managed to include a full kitchen and a workspace without feeling cramped.

Usage: Usually precedes the noun it describes.

### 2. dense or packed

adjective · CEFR B2

closely packed together or very solid.

For teachers: closely and firmly packed together; having high density.

- The snow was so compact that we could walk on top of it.
- The geologist explained that the compact layers of sedimentary rock had been formed over millions of years of intense pressure.

### 3. to compress

verb · CEFR B2

to press something together so that it becomes smaller or harder.

For teachers: to exert pressure on a substance so that it becomes more dense or occupies less space.

- The machine compacts the waste into small cubes for recycling.
- Before laying the foundation, the construction crew used heavy machinery to compact the soil and ensure a stable base for the building.

Usage: This is a transitive verb requiring a direct object.

### 4. a formal agreement

noun · CEFR C1 · Formal

a formal promise or agreement between two or more people or groups.

For teachers: a formal agreement or contract between different parties, often used in political or legal contexts.

- The two nations signed a compact to protect the shared river.
- The Mayflower Compact served as an early social contract, establishing a rudimentary form of self-government for the settlers in the new colony.

Usage: Often used with the verb 'to sign' or 'to enter into'.

### 5. makeup case

noun · CEFR B2

a small case with a mirror and face powder that you carry in a bag.

For teachers: a small, portable case containing a mirror and cosmetic powder, typically designed for use in a handbag.

- She took a small compact out of her purse to check her lipstick.
- The vintage silver compact was an heirloom passed down from her grandmother, still containing the original glass mirror.

## Examples

- The two nations signed a peace compact.
- The local businesses formed a compact to reduce plastic waste across the entire shopping district.
- The Mayflower Compact is often cited as one of the earliest examples of a self-governing agreement in the history of the American colonies.

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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.