underrun
noun, verb
underrun is a noun meaning “A condition in which fewer products are delivered or produced than had been ordered” (English Wiktionary, September 2026). It is spelled U-N-D-E-R-R-U-N, and it appears about once in every 72 million words in written English (wordfreq, 2021 data). The plural of underrun is underruns.
What does underrun mean?
noun
- 1
A condition in which fewer products are delivered or produced than had been ordered.
- 2
A condition in which the read/write buffer is fed with data at a slower rate than required; a buffer underrun.
verb
- 1
To run or pass under.
- 2
To pass along and under, e.g. a cable, for the purpose of taking it in or examining it.
- 3
To separate the parts of (a tackle) and put them in order.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How do you pronounce underrun?
- US
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract). Recordings: LL-Q1860_(eng)-Flame,_not_lame-underrun.wav, Wikimedia Commons (author and licence on each file's page).
Forms of underrun
- underruns plural, present, singular, he/she/it
- underrunning participle, present
- underran past
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is underrun?
Underrun appears about once in every 72 million words in written English, the 269,040th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does underrun come from?
From under- + run.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).