fading
v. B1 Intermediate US //ˈfeɪdɪŋ// UK //fˈeɪdɪŋ// fad·ing
v. to lose color, brightness, or strength slowly over time. You use this when clothes get lighter after many washes or when a sound gets quieter.
v. to lose brightness, vividness, or intensity gradually. Often describes the degradation of pigments or the diminishing volume of an auditory signal.
The old photograph is fading because of the sunlight.
The blue curtains are fading after years of hanging in the bright south-facing window.
As the sun dipped below the horizon, the vibrant oranges and pinks began fading into a deep, uniform indigo that signaled the arrival of night.
Usage
Often used in the progressive form ('is fading') to describe a continuous process; can be used transitively or intransitively.