1. unfriendly or aggressive feelings or behavior toward someone or something
2. active opposition or resistance to an idea, plan, or project
3. acts of warfare or armed conflict
Usage: military

Examples

• The meeting was marked by open hostility between the two groups.
• She sensed hostility in his voice when he answered the phone.
• There was widespread hostility to the proposed tax increase.
• The hostility between the neighboring countries lasted for decades.
• His hostility toward new technology made him difficult to work with.
• The ceasefire ended years of hostility in the region.
• The crowd’s hostility was evident from their angry shouts.