Dark pools are private exchanges or forums for trading securities that operate outside of public view.

The Dark Web is a hidden part of the internet that requires special software to access.

I saw a row of dark lanthorns hanging from the ceiling.

She embraced the dark life with open arms.

Taking a stab in the dark, I guessed the answer to the riddle.

The dark flows in the cave were mesmerizing.

He was whistling in the dark.

He whistled in the dark to calm his nerves.

He whistles in the dark to calm his nerves.

The dark sides of human nature can be unsettling.