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Revolving about or surrounding the moon.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Astronomy) around or revolving around the moon: a circumlunar orbit.
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌsɜr kəmˈlu nər)

orbiting or surrounding the moon.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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References in periodicals archive ?
The mission led to the Soviet Union delaying their crewed flight and, in December 1968, the Americans' Apollo 8 became the first piloted circumlunar mission.
The exciting circumlunar journey not only brings fame to the three explorers but also emboldens American scientists and engineers.
Ryan Lau of Cornell University and his collaborators studied the galaxy's circumlunar ring (CNR), while Matt Hankins of the University of Central Arkansas in Conway is lead author of the other paper, regarding the quintuplet cluster (QC).
The agreement signed in conjunction with the Royal Aeronautical Society's 3rd European Space Tourism Conference calls for XCOR to provide suborbital flight familiarization and training using its Lynx vehicle for Excalibur Almaz crews traveling on Earth orbit, circumlunar, and deep space missions.
Nonetheless, Phillips continued to make critical decisions on a daily basis, perhaps none greater than the decision to pursue a circumlunar orbit for Apollo 8.
According to Space Adventures, the circumlunar trip will require at least two months of training to help familiarize the passengers with spacecraft and the outer space environment.
He was selected for a circumlunar mission that never flew.
The Zond Soviet spacecraft, launched from 1968-1970 by large Proton vehicles, flew on circumlunar trajectories, returning to Earth after passing over the Moon's far side.
According to a leaked strategy document from Russia's space agency, Roskosmos, a spacecraft will "conduct a demonstrative manned circumlunar test flight with the subsequent landing of cosmonauts on [the Moon's] surface and their return to Earth" by 2030.
By this time the CIA was also regularly briefing members of Congress, such as the House Science and Astronautics Committee, and select staff members, on various Soviet space developments, such as the Zond-5 circumlunar mission and other space launches.
In 1959, just over a year after NASA began operation, it prepared a formal long-range plan that announced that its goal in the 1960s "should make feasible the manned exploration of the moon and nearby planets, and this exploration may thus be taken as a long-term goal of NASA activities." The plan called for the "first launching in a program leading to manned circumlunar flight and to a permanent near-earth space station" in the 1965-1967 period.