# fasten onto

CEFR C1 · Phrasal verb

Source: https://englishreference.com/word/fasten-onto
Updated: 2026-04-24

## Definition

to become very interested in an idea or person, often because you think they will be useful to you.

For teachers: to attach oneself to an idea, person, or theory with great interest or persistence; often implies a sudden or opportunistic focus.

## Examples

- The media will fasten onto any small mistake he makes.
- She fastened onto the idea of moving to Italy after seeing just one travel documentary.
- The opposition party was quick to fasten onto the latest economic figures as evidence of the government's failure.

## Pitfalls

- Not "He fastened at the idea." but "He fastened onto the idea." — the phrasal verb requires the particle 'onto' to show the direction of the focus.

## Usage notes

- usually followed by an object representing an idea, a person, or a specific detail.
- Teaching tip: contrast with 'latch onto', which is more common in casual speech; 'fasten onto' sounds slightly more deliberate or formal.

---

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.