1. relating to or situated in the region of space between the Earth and the Moon
Usage: astronomy; space science

Examples

• The spacecraft will operate in cislunar space for several months.
• NASA is developing new technologies for cislunar exploration.
• The satellite follows a cislunar orbit around Earth.
• Cislunar missions are becoming more common as space agencies expand their reach.
• The crew will conduct experiments in the cislunar environment.
• Future lunar bases will rely on cislunar supply routes.