1. in a way that is so slight or gradual as to be barely noticeable

Examples

• The sun moved imperceptibly across the sky during the long afternoon.
• Her breathing slowed imperceptibly as she fell asleep.
• The temperature dropped imperceptibly throughout the evening.
• He shifted imperceptibly closer to the door, hoping to escape unnoticed.
• The old building was sinking imperceptibly into the soft ground.
• The colors in the painting blended imperceptibly from blue to green.