overspeed

From over- +‎ speed.

• (General American) IPA^(key): /ˌoʊvərˈspid/
• (Received Pronunciation) IPA^(key): /ˌəʊvəˈspiːd/
• Hyphenation: over‧speed

overspeed (third-person singular simple present overspeeds, present participle overspeeding, simple past and past participle (mostly US) oversped or (mostly UK) overspeeded)

1. (intransitive) To travel excessively fast or beyond the permitted rate.
   • 1691, John Evelyn, Kalendarium Hortense:

     Caully-flowers over-speeding to pome and head..should be quite erradicated ^{[sic, meaning eradicated]}.

2. (usually transitive, sometimes intransitive, chiefly mechanics) To operate an engine or machine too fast.
   • 1949, A. C. Walshaw, Heat Engines (3 ed.):

     The device should be periodically tested by overspeeding the engine say once a month.

overspeed (countable and uncountable, plural overspeeds)

1. Speed that exceeds a reasonable or permitted rate.
   • 1826, Samuel Weller Singer, The Dramatic Works Of William Shakespeare: Macbeth. Hamlet, Prince Of Denmark. King Lear...:

     Trashes are clogs strapped round the neck of a dog to prevent his overspeed.

• “overspeed”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.
• “overspeed”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.