1. (noun) a slow or gradual disappearance

• fadeout

2. (noun) the act of becoming more distant

• recession

1. (adjective) (of a hairline e.g.) moving slowly back

• backward

1. (noun) a slow or gradual disappearance

• disappearance

2. (noun) the act of becoming more distant

• withdrawal

1. (noun) a slow or gradual disappearance

• dissolve
• fade away
• fade out
• recede

2. (noun) the act of becoming more distant

• draw back
• move back
• pull away
• pull back
• recede
• retire
• retreat
• withdraw
• drop off
• fall back
• fall behind
• lose
• recede
• recede
• recessional