# blocker

/ˈbɫɑkɝ/ (US) · /blˈɒkɐ/ (UK) · CEFR B2 · Noun

Source: https://englishreference.com/word/blocker
Updated: 2026-08-15

## Definition

something that stops you from making progress on a task or project. In a work setting, it is often a problem you need someone else to solve before you can continue.

For teachers: an obstacle or impediment that prevents a process or task from advancing. In agile project management, it refers specifically to an external dependency or issue that halts a team member's workflow.

## Examples

- The lack of a budget is a major blocker for our project.
- During the morning meeting, the developer mentioned that the server downtime was a blocker for the new software release.
- Identifying potential blockers early in the development cycle allows the project manager to reallocate resources and prevent a total stall in the production pipeline.

## Usage notes

- Commonly used in professional and technical environments to describe workflow interruptions.

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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.