# to a hair

> English word · Prep_phrase · IPA /tuː‿ə ˈhɛə/

## Definitions
1. To a high degree of precision; with the utmost exactness; to a nicety.

## Etymology
A reference to the very small diameter of a strand of hair: compare hair's breadth.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/to-a-hair