hang by a hair

present singular third person hangs by a hair · participle present hanging by a hair · participle past hung by a hair · past hung by a hair

1. Synonym of hang by a thread.

   This was the moment in the whole process of their mutual vigilance in which it decidedly most hung by a hair that their thin wall might be pierced by the lightest wrong touch.

   1904 November 10, Henry James, The Golden Bowl, volume (please specify |volume=I or II), New York, N.Y.: Charles Scribner’s Sons, →OCLC

   Synonyms: hang by a thread