loopback
noun
loopback is a noun meaning “The routing of a signal, data stream, etc. from its origin back to the origin, primarily as a means of testing the transmission or transportation…” (English Wiktionary, September 2026). It is spelled L-O-O-P-B-A-C-K, and it appears about once in every 16 million words in written English (wordfreq, 2021 data). The plural of loopback is loopbacks.
What does loopback mean?
noun
- 1
The routing of a signal, data stream, etc. from its origin back to the origin, primarily as a means of testing the transmission or transportation infrastructure.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of loopback
- loopbacks plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is loopback?
Loopback appears about once in every 16 million words in written English, the 121,279th 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 loopback come from?
From loop + back.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).