Definition of at a venture in English:

at a venture

phrase

archaic
  • Trusting to chance rather than to previous consideration or preparation:

    ‘a man drew a bow at a venture’
    • ‘So he went down the staircase at a venture, without any idea where to go.’
    • ‘And a certain man drew a bow at a venture, and smote the king of Israel between the joints of the harness.’