1. giving an answer or reply to something
Usage: present participle of respond
2. reacting to a situation, treatment, or stimulus
Usage: present participle of respond

Examples

• She is responding to emails from her customers.
• The patient is responding well to the new medication.
• Emergency crews are responding to the accident scene.
• He wasn’t responding to my text messages.
• The audience was responding enthusiastically to the performance.
• The company is responding to complaints about their service.
• The fire department is responding to multiple calls tonight.