'Hair's breadth' definitions:
Definition of 'Hair's breadth'
From: GCIDE
- Hairbreadth \Hair"breadth`\ (-br[e^]dth), Hair's breadth \Hair's" breadth`\ (h[^a]rz"-). The diameter or breadth of a hair; a very small distance; sometimes, definitely, the forty-eighth part of an inch. [Also spelled hairsbreadth.] [1913 Webster]
- Every one could sling stones at an hairbreadth and not miss. --Judg. xx. 16. [1913 Webster]