# key in on

CEFR B2 · Phrasal verb

Source: https://englishreference.com/word/key-in-on
Updated: 2026-04-24

## Definition

to focus closely on something important or noticeable, often in a context of analysis or attention.

For teachers: to concentrate on or identify a specific detail or aspect; transitive phrasal verb with inseparable particles, typically used in contexts requiring deliberate attention or analytical focus.

## Examples

- The detective keyed in on the suspect's accent.
- During the meeting, the manager keyed in on the budget issues.
- The analyst keyed in on the subtle inconsistencies in the report, leading to the discovery of fraud.

## Pitfalls

- Not "He keyed in the details." but "He keyed in on the details." — 'on' is required to indicate the focus; 'key in' alone means to input data into a system.

## Usage notes

- typically followed by a specific detail or aspect being focused on.
- Teaching tip: contrast with 'focus on' (more general) and 'zero in on' (more intense); 'key in on' implies a deliberate analytical focus rather than casual attention.

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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.