evanescence

noun
UK /ˌevəˈnesns/
US /ˌevəˈnesns/

The act of slowly fading away and disappearing.

The evanescence of the morning mist made the hills seem to vanish.


OTHER MEANINGS

2. The quality of being fleeting or short-lived.

The evanescence of summer vacation made it feel like a dream.

3. A gradual vanishing of something, such as a sound or image.

The evanescence of the echo left the canyon silent.

4. In physics, the fading of a particle or signal over time.

The evanescence of the light pulse was measured by the sensor.