[suhb-stey-shuh n]


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

First recorded in 1885–90; sub- + station Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for substation

Contemporary Examples of substation

Historical Examples of substation

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

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