melt into

verb

melt into

verb

1

Idiomatic To disappear gradually into.

The Roman Empire has melted into history.2004 April 11, Ron Feinberg, “CLIMBING MASADA”, in Atlanta Journal Constitution:
Either they melted into society or they swept through to there [sic] villages2005 October 1, Jennifer Eccleston, CNN_LiveSat:

2 more examples

"The spirits are calling, I must go," she said to Lady Miranda, then executed a quick turn and melted into the crowd with an expertise born of years of practice.2006, Jacquie D'Alessandro, Never a lady:
A tough Iraqi general, a former special operations officer with a baritone voice and a barrel chest, melted into smiles when asked about Senator Barack Obama.2008 July 17, Sabrina Tavernise, Richard A. Oppel Jr., “Foreign Desk”, in New York Times:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.