хіба́

• conjunction
• Level B1
• Rank 2,679 of 12,000
• 0.005% of running text

unless

Recording: Wikimedia Commons

• particle
• Level B2
• Rank 3,183 of 12,000
• 0.004% of running text

perhaps, maybe

Recording: Wikimedia Commons

Meanings

1. unless (conjunction)
2. perhaps, maybe
3. really?, is it possible?, indeed

The dictionary keeps one entry for the spelling хіба, so these meanings cover every use above.