# data warehouse

CEFR C1 · Compound

Source: https://englishreference.com/word/data-warehouse
Updated: 2026-07-22

## Definition

a large digital storage system where a company keeps all its important information in one place. It helps businesses look at their history and make better decisions.

For teachers: a large, centralised repository of data integrated from multiple sources, specifically structured for query and analysis rather than transaction processing.

## Examples

- The company stores all its sales records in a data warehouse.
- By moving all customer information into a data warehouse, the marketing team can easily track buying trends over the last five years.
- The architecture of a modern data warehouse allows for the consolidation of disparate data streams, enabling complex analytical processing that informs long-term corporate strategy.

## Usage notes

- Often used in business and IT contexts; typically takes a singular verb when referring to the system as a whole.

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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.