1. acts of warfare or armed conflict between enemies
Usage: usually plural
2. unfriendly or aggressive behavior or attitudes
Usage: usually plural

Examples

• The two countries agreed to cease hostilities and begin peace talks.
• Hostilities broke out along the border after months of tension.
• The treaty formally ended hostilities between the warring nations.
• There were open hostilities between the rival political factions.
• The ambassador worked to reduce hostilities through diplomatic channels.
• Both sides suspended hostilities during the humanitarian crisis.
• Personal hostilities made it difficult for the committee to work together.