Definitions
1.NounA condition in which fewer products are delivered or produced than had been ordered.
2.NounA condition in which the read/write buffer is fed with data at a slower rate than required; a buffer underrun.
3.VerbTo run or pass under.
4.VerbTo pass along and under, e.g. a cable, for the purpose of taking it in or examining it.
5.VerbTo separate the parts of (a tackle) and put them in order.