What does "blue-chip" mean?

Alternative form of bluechip (“high-value”).

Blue-chip

adj

adj ·Rare ·Advanced level

Adjective

1
Alternative form of bluechip (“high-value”). alt-of, alternative, not-comparable
"She is a leading figure in the stable at Gagosian, the bluest of blue-chip galleries, […]."

Adjective

"She is a leading figure in the stable at Gagosian, the bluest of blue-chip galleries, […]."