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English Lexicon

Substation

/ˈsʌbˌsteɪ.ʃən/
nounCEFR B2 (Upper)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    A subsidiary station in an electrical power distribution system where voltage is transformed from high to low or vice versa.

    "The local electrical substation supplies power to hundreds of residential homes."
  2. 2

    A subordinate office, station, or post that depends on a central authority or headquarters.

    "The police department operates a regional substation in the northern district."
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Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the prefix sub- (meaning 'under', 'beneath', or 'subordinate') combined with station, originating from Latin statio ('a standing, post, or station'). It entered modern technical English in the late 19th century with the rapid expansion of electrical power grids and railway systems to denote subsidiary distribution nodes.

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