Definition of at hack in English:

at hack

phrase

  • (of a young hawk) given partial liberty but not yet allowed to hunt for itself.

    • ‘For a hawk at hack, food is often tied to the hack board to discourage her from forming the habit of carrying.’
    • ‘To be at hack is to be in the state of partial liberty in which eyas hawks are kept before being trained, not being allowed to prey for themselves.’