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tr.v. un·der·ran (-răn′), un·der·run, un·der·run·ning, un·der·runs
1. To run, pass, or go beneath.
2. Nautical To haul (a line or cable) onto a boat for inspection or repair.
1. Something that runs under, as:
a. An amount or a quantity produced that is less than what has been estimated.
b. The difference between this amount or quantity and what has been estimated.
2. An undercurrent.


vb, -runs, -running, -ran or -run
1. (tr) to go beneath
2. (Nautical Terms) (tr) to check the hull of (a boat)
3. (Nautical Terms) (tr) to retract (a net or trawl)
4. (Broadcasting) (intr) (of a broadcast programme) to fall short of scheduled time
5. the degree to which a programme underruns
6. the action of going beneath
7. an undercurrent


(ˌʌn dərˈrʌn)

v. -ran, -run, -run•ning,
n. v.t.
1. to run, pass, or go under.
2. something that runs or passes underneath, as a current.
3. an instance of costing less than estimated.
4. a production run below the quantity ordered.
References in classic literature ?
The moonlight turns the lower strata to silver without a stain except where our shadow underruns us.
Tenders are invited for printing: tyvek envelopes: 16,000 envelopes with underrun or overrun not to exceed 5%.
The rightmost columns of Table 2 report the underrun or overrun percentage for each log as well as an overall average.
The EPC contract includes a guaranteed maximum price of A$107 million, with cost underrun and performance incentives to support early completion and an under-budget result.
The truck also comes with safety features such as ABS, Front Underrun Protection System (FUPS), Rear Underrun Protection System (RUPS), among others.
The series is suitable for use in applications from tipper and reefer trucks to general cargo vehicles, and includes a range of safety features, including an anti-lock braking system, front underrun protection system (FUPS) and rear underrun protection system (RUPS).
The regulatory requirement in Economic Commission for Europe (ECE R58) regulation applies to the Rear underrun protection devices which are intended to be fitted to commercial vehicles of N categories.
The Saudi Standards, Metrology and Quality Organisation (SASO) released the technical regulations for the underrun protective devices in trucks, bearing the following technical specifications numbers: SASO-GSO 2112:2012 "Motor Vehicle- front underrun protective devices in trucks and its testing methods; (SASO-GSO 2113:2012) "Motor Vehicles-Lateral Protection of Truck and Trailer and its testing methods"; and SASO-GSO 2114:2012) "Motor Vehicles Rear underrun protective devices for truck and trailer and its testing methods".
Evans said, 'My forecast does not see inflation rising to our 2 percent target until 2018 -- for me, that's too far down the road given how long we have underrun our target.
Conformations such as heel contraction, underrun heels, club footedness, or medial/lateral hoof flaring will become more noticeable and perhaps develop into a cause for lameness if not addressed earlier in his life.
Corresponding with Japan's upgraded safety standards the Titan features an updated rear underrun protection device that prevents passenger vehicles from becoming pinned under the vehicle in the event of a rear-end collision.
Government cancelled penalties for underrun of power energy.