What is the borg cube in Star Trek?

The Borg Cube is a fictional spacecraft used by the Borg, a cyborg race in the Star Trek universe. It is a massive, blocky vessel with a distinctive cubic shape, and is typically depicted as being dark grey or black in colour. The Borg Cube is equipped with powerful weapons, including cutting beams, phaser cannons, and torpedo launchers, and is also able to regenerate itself. It serves as both a warship and a mobile base of operations for the Borg.