- archaic or literary a daring spirit or deed; boldness or bold action
WordReference Random House Unabridged Dictionary of American English © 2026
der•ring-do
(der′ing do̅o̅′),USA pronunciation n.
- daring deeds;
heroic daring.
- Middle English durring-do literally, daring to do, erroneously taken as noun, nominal phrase. See dare, do1 1325–75
Collins Concise English Dictionary © HarperCollins Publishers::
derring-do /ˈdɛrɪŋˈduː/ n