Head-of-steam definition

(idiomatic) Amount of energy.
noun
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Other Word Forms

Noun

Singular:
head-of-steam
Plural:
heads of steam

Origin of head-of-steam

  • From the need of the boiler of a steam locomotive to exceed a minimum amount of pressure (See head (“buildup of fluid pressure”), also pressure head.) before the locomotive could start moving.

    From Wiktionary