black diamond

noun

1

: dense black hematite

2

black diamonds plural : coal sense 3a

3

: carbonado entry 3

Examples of black diamond in a Sentence

Recent Examples on the Web

Go slow and steady down its beginner terrain, which makes up eight percent of the mountain; a bit faster down its intermediate blues, which make up 42 percent of the mountain; or zoom down the black diamonds, which make up the other 50 percent. —Stacey Leasca, Travel + Leisure, 25 Feb. 2026

Experienced skiers will want to shuttle down to the base to access the resort’s double black diamond runs. —Condé Nast, Condé Nast Traveler, 20 Feb. 2026

The man, identified as Stuart McLaughlin of Hillsborough, was pronounced dead by the Northstar Fire Department on the Polaris trail, a black diamond run accessed via the resort’s Backside Express lift. —Sacbee.com, 19 Feb. 2026

In one-of-a-kind high-jewelry chokers and necklaces, the design is rendered in black diamond-like carbon, or DLC—a high-tech material known for its exceptional hardness and scratch-resistance that is often used in watchmaking—and combined with diamonds and yellow gold for an avant-garde look. —Paige Reddinger, Robb Report, 7 Feb. 2026

Word History

First Known Use

1763, in the meaning defined at sense 3

Kids Definition

black diamond

noun

: carbonado