Definition from Wiktionary, the free dictionary
- The degree or quality of being venturesome.
- 1899: Joseph Conrad, Youth And Two Other Stories 
- Somebody must lead the way. I just showed that the thing could be done; but you men brought up to the use of steam cannot conceive the vast importance of my bit of venturesomeness to the Eastern trade of the time.
- 1899: Joseph Conrad, Youth And Two Other Stories