1. To be clearly able to hear and understand what one is saying over the telephone or radio. Yes, ground control, I hear you loud and clear. We're hearing you loud and clear, Reggie. You can go ahead and bring your rig into the station.

2. To understand exactly what one means. I heard you loud and clear, Janet—first secure the deal, and then worry about the details. A: "Do you understand why this is so important?" B: "Yes, yes, I hear you loud and clear."