Definition of a firm hand in English:
Strict discipline or control.
- He certainly took a firm hand now, enforcing strict discipline and enjoining severe punishments for those who shirked their duties or who tried to go home again.
- Generals always need to be controlled with a firm hand.
- Therefore, the candidate must have a firm hand in controlling every single event that could be construed to help his campaign.
Definition of a firm hand in:
- British & World English dictionary