# sexy

/ˈsɛksi/ (US) · /sˈɛksi/ (UK)

Source: https://englishreference.com/word/sexy
Updated: 2026-06-19

## Senses

### 2. exciting or trendy

adjective · CEFR B2 · Informal

exciting, interesting, or fashionable.

For teachers: metaphorically applied to objects, projects, or ideas that are trendy, intriguing, or likely to generate significant public interest.

- The company is looking for a sexy new design for their smartphone.
- The marketing team struggled to make the data-storage software sound sexy to potential investors during the pitch.

### 3. prime numbers

adjective · CEFR C2 · Technical · Humorous

describes two prime numbers that have a difference of six.

For teachers: referring to a pair or group of prime numbers that differ from each other by six.

- The numbers 5 and 11 are an example of a sexy prime pair.
- In number theory, sexy primes are pairs of prime numbers such as 13 and 19 that maintain a constant difference of six.

Usage: Used as a pun on the Latin word 'sex' for six.

## Examples

- The new sports car has a very sexy design.
- The marketing team complained that the data security project wasn't sexy enough to attract major investors.
- While the core engineering is robust, the company struggled to find a sexy angle for the product launch that would resonate with a younger, trend-conscious demographic.

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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.