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[suhb-stey-shuh n] /ˈsʌbˌsteɪ ʃən/
a branch of a main post office.
an auxiliary power station where electrical current is converted, as from AC to DC, voltage is stepped up or down, etc.
Origin of substation
1885-90; sub- + station Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for substation
Contemporary Examples
Historical Examples
  • By this circuit the transmitter at the substation is supplied with current.

  • They'll be doing fine if they make it to the substation in another two weeks.

    Legacy James H Schmitz
  • Reaching town, Andy turned aside to the State Police substation.

    Swamp Cat James Arthur Kjelgaard
  • These earth-return cables are connected in series with special low-voltage dynamos (called negative boosters) at the substation.

  • Having received its experimental material, the plasmoid requested the Devagas to stay away from the substation for a while.

    Legacy James H Schmitz
  • I just went to the substation and checked out with the squad.

    Warren Commission (12 of 26): Hearings Vol. XII (of 15) The President's Commission on the Assassination of President Kennedy
  • "Then they'll show up at the substation again four or five days behind us," the Commissioner said.

    Legacy James H Schmitz
  • So could the fact that they had constructed the substation for it—in itself a grave breach of Federation treaties.

    Legacy James H Schmitz
British Dictionary definitions for substation


a subsidiary station
an installation at which electricity is received from one or more power stations for conversion from alternating to direct current, reducing the voltage, or switching before distribution by a low-tension network
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
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Word Origin and History for substation

1881, in the policing sense, from sub- + station (n.). Power grid sense is attested from 1901.

Online Etymology Dictionary, © 2010 Douglas Harper
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