(often initial capital letters) U.S. Aerospace. the portion of the Apollo spacecraft that contained the crew's living compartment and the on-board controls.
Origin of command module
First recorded in 1960–65
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the cone-shaped module used as the living quarters in an Apollo spacecraft and functioning as the splashdown vehicle
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012