[ suhb-stey-shuhn ]

  1. a branch of a main post office.

  2. an auxiliary power station where electrical current is converted, as from AC to DC, voltage is stepped up or down, etc.

Origin of substation

First recorded in 1885–90; sub- + station

Words Nearby substation Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use substation in a sentence

  • One of the items published by Parastoo was a blueprint for a substation at a proposed nuclear plant in South Carolina.

  • There are also reports that there was at least one substation explosion in the Greenwich Village area.

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

  • The postmark is that of the substation in the city which is nearest to a certain political headquarters on Fourteenth Street.

    Within Prison Walls | Thomas Mott Osborne
  • A train of our ether waves accidently fell into parallelism with a train of waves from the Venus substation.

    John Jones's Dollar | Harry Stephen Keeler
  • "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


/ (ˈsʌbˌsteɪʃən) /

  1. a subsidiary station

  2. 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