1. recording or entering information officially in a list or record
2. showing or indicating a measurement, reading, or level
3. becoming aware of or noticing something

Examples

• She is registering for her college classes next week.
• The thermometer is registering 98 degrees.
• He wasn’t registering what the teacher was saying.
• Her face was registering complete surprise.
• The company is registering all new employees today.
• The scale is registering a five-pound weight loss.
• It took a moment for the news to start registering with him.