- 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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for substation
One of the items published by Parastoo was a blueprint for a substation at a proposed nuclear plant in South Carolina.Did Iran’s Cyber-Army Hack Into the IAEA’s computers?
December 5, 2012
There are also reports that there was at least one substation explosion in the Greenwich Village area.How Long Until New York Gets Back Up and Running?
October 30, 2012
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
By this circuit the transmitter at the substation is supplied with current.Cyclopedia of Telephony & Telegraphy Vol. 1
These earth-return cables are connected in series with special low-voltage dynamos (called negative boosters) at the substation.The New Gresham Encyclopedia
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
- 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
Word Origin and History for substation
Online Etymology Dictionary, © 2010 Douglas Harper