the status of full-time service: on active duty.
Also called active service.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for active service
esp US active duty
military duty in an operational area
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
Idioms and Phrases with active service
Full-time service, as in Julian is 81, but he still comes to the office every day and is very much on active duty. This term comes from the military, where it stands in opposition to reserve, which refers to troops still in the military but not actively engaged. It is occasionally transferred to civilian matters as well. [First half of 1800s]
The American Heritage® Idioms Dictionary
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