# nit

/ˈnɪt/ (US) · /nˈɪt/ (UK)

Source: https://englishreference.com/word/nit
Updated: 2026-08-27

## Senses

### 1. egg of a louse

noun · CEFR B2

the tiny egg of a head louse, usually found attached to human hair.

For teachers: the egg of a parasitic louse, particularly the head louse, typically cemented to a hair shaft.

- The school sent a letter home after one student was found to have nits.
- The nurse conducted a thorough inspection of the children's hair to ensure no nits remained after the initial treatment.

### 2. a minor mistake

noun · CEFR C1 · Informal

a very small, unimportant detail or mistake that someone complains about.

For teachers: a trivial detail or minor shortcoming, typically the subject of pedantic criticism or nitpicking.

- The report was excellent, though the editor found a few nits in the formatting.
- While the overall strategy was sound, the board spent hours arguing over minor nits that had no impact on the final outcome.

### 3. a foolish person

noun · CEFR C1 · British English · Informal

a person who is silly or not very smart.

For teachers: a fool or a simpleton; a shortened form of nitwit.

- Don't be such a nit; you know that's not how the machine works.
- He felt like a complete nit after realizing he had been holding the map upside down for the last three miles.

### 4. unit of brightness

noun · CEFR C2 · Technical

a unit used to measure how bright a screen or light is.

For teachers: a unit of measurement for luminance, equivalent to one candela per square metre.

- The new smartphone screen can reach a peak brightness of two thousand nits.
- Engineers increased the display's output to five hundred nits to ensure legibility even under direct sunlight.

### 5. cautious player

noun · CEFR C1 · Slang

a player who is very careful and only takes risks when they have a perfect hand.

For teachers: a player characterized by an exceptionally cautious, tight, and reactive style, often avoiding risks unless they hold a significant advantage.

- He is such a nit that he folded his cards even though he had a good hand.
- The professional exploited the nit at the table by frequently bluffing, knowing the cautious player would only call with the absolute nuts.

## Examples

- The school nurse checked the children for nits.
- The editor found a few nits in the final draft, but the overall argument was very strong.
- While the technical report was fundamentally sound, the committee spent hours arguing over minor nits regarding the formatting of the appendices rather than addressing the core data.

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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.