To doubt not but Meaning, Definition & Usage

Definitions

1. .

   I do not doubt but I have been to blame. Dryden.

   We doubt not now But every rub is smoothed on our way. Shak.

   That is, we have no doubt to prevent us from believing, etc. (or notwithstanding all that may be said to the contrary) but having a preventive sense, after verbs of "doubting" and "denying" that convey a notion of hindrance. E. A. Abbott.