:overrun: n. 1. [techspeak] Term for a frequent consequence of data
arriving faster than it can be consumed, esp. in serial line
communications. For example, at 9600 baud there is almost exactly
one character per millisecond, so if a {silo} can hold only two
characters and the machine takes longer than 2 msec to get to
service the interrupt, at least one character will be lost.
2. Also applied to non-serial-I/O communications. "I forgot to
pay my electric bill due to mail overrun." "Sorry, I got four
phone calls in 3 minutes last night and lost your message to
overrun." When {thrash}ing at tasks, the next person to make a
request might be told "Overrun!" Compare {firehose
syndrome}. 3. More loosely, may refer to a {buffer overflow}
not necessarily related to processing time (as in {overrun
screw}).
-- The AI Hackers Dictionary