Meanings
nounflat line (plural flat lines)
plural flat lines
- alternativeAlternative form of flatline.
"Overall satisfaction with rail journey", as measured fortnightly by Transport Focus, has maintained a broadly flat line at around 85% across the last four months of travel disruption, while "satisfaction with punctuality/reliabilty" is hovering around 75%.
2023 February 8, Sir Michael Holden, “Comment: Boom or bust: time to decide”, in RAIL, number 976, page 3
Cite this entry
APA
flat line. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/flat%20line
MLA
“flat line.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/flat%20line. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “flat line,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/flat%20line.
Source: flat line on Wiktionary, CC BY-SA 4.0.