one of five locations in space relative to two bodies where a third, less massive body can maintain a stable orbit around a common center of mass

the places where the gravity from two orbiting objects balance each other.

The dynamic gravity balancing point which exists between three heavenly bodies (Sun, Earth, and Moon) which mathematician Joseph-Louis Lagrange found in the 18th century. A colony is constructed in each of the three unstable Earth-based Lagrange points that the gravity of the Earth balances due to the centripetal force of the Earth and the rotation of the moon. The remaining two Lagrange Points are stable orbits and can be found between Earth and Jupiter.

Lagrange Point is an RPG game by Konami, released only in Japan in 1991. The name references Lagrangian points, the five positions in space where a body of negligible mass could be placed which would then maintain its position relative to two existing massive bodies.