Definitions for underrunˌʌn dərˈrʌn
Random House Webster's College Dictionary
un•der•runˌʌn dərˈrʌn(v.; n.)-ran, -run, -run•ning
(v.t.)to run, pass, or go under.
(n.)something that runs or passes underneath, as a current.
an instance of costing less than estimated.
a production run below the quantity ordered.
Origin of underrun:
A condition in which fewer products are delivered or produced than had been ordered.
A condition in which the read/write buffer is fed with data at a slower rate than required; a buffer underrun.
to run or pass under; especially (Naut.), to pass along and under, as a cable, for the purpose of taking it in, or of examining it