submaster

plural submasters

1. attributivesometimesA key that can open several locks, but fewer than a master key.

   The use of masters and submasters will enable suites of rooms to be controlled by one key.

   2020, Jane M. Wiggins, Facilities Manager's Desk Reference, page 517

   2 more examples

   In an office, a submaster might open all doors in the accounting department; in an industrial facility, it might open all locks in the loading dock area.

   2004, Robert Fischer, Introduction to Security, page 175

   Do not point specifically at the executives but find out what the cost estimates are for rekeying a submaster space or the entire facility when one of these keys gets lost […]

   2008, Timothy Giles, How to Develop and Implement a Security Master Plan, page 60

2. A copy of a master copy of a recording, generally kept for archival purposes.

   Unlike cue or group information, submasters usually actively exist and don't need to be created. Methods for recording channel information into different submasters may vary between consoles.

   2013, Steven Shelley, A Practical Guide to Stage Lighting, page 336

   1 more example

   In Edward's absence, Sonny Boy learned to press the discs at Chariot Records. He mastered a process of producing gold-molded submasters that could be played on the phonographs people were now buying for their homes.

   2014, John Milner, Benson's House, page 196

3. historicaleducationA secondary or subsidiary schoolmaster.

   Masters […] Submasters […] Teacher of French […] Teacher of drawing

   1914, National Vocational Guidance Association. Meeting, Vocational Guidance: Papers Presented at the Organization..., page 252