# MAU

/ˈmaʊ/ (US) · CEFR C1 · Noun

Source: https://englishreference.com/word/mau
Updated: 2026-05-09

## Definition

Stands for Monthly Active Users. The number of unique people who visit a website or use an app at least once during a 30-day period.

For teachers: Abbreviation for Monthly Active Users. A key performance indicator (KPI) representing the total number of unique visitors or accounts that engage with a digital platform within a calendar month.

## Examples

- The app reached one million MAU just six months after launch.
- Investors are closely monitoring the platform's MAU to determine if the recent marketing campaign successfully increased long-term engagement.
- While total downloads provide an initial metric of interest, MAU offers a more accurate reflection of a product's stickiness and the actual size of its recurring user base.

## Usage notes

- Commonly used as a collective plural noun in business and tech contexts; often treated as a singular metric in financial reporting.

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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.