1. equipped with weapons; armed and ready for combat
2. in a state of rebellion or revolt

1. while holding or carrying in one's arms

Examples

• The soldiers stood in arms, waiting for the command to advance.
• The population rose in arms against the oppressive regime.
• She carried the sleeping child in arms down the hallway.
• The militia was in arms and ready to defend the town.
• He held the infant in arms, rocking gently.
• The citizens took up in arms to protest the unjust law.