Underspeed

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An excessively-low speed; a speed lower than the minimum operating speed. uncountable

    "An underspeed switch drops the load off if engine speed falls to 380 r.p.m. and an overspeed governor shuts the engine off if its speed rises above 1,700 r.p.m."

Example

More examples

"An underspeed switch drops the load off if engine speed falls to 380 r.p.m. and an overspeed governor shuts the engine off if its speed rises above 1,700 r.p.m."

Etymology

From under- + speed.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.