flatline - WordReference.com Dictionary of English

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- - flat-top
  - flat-woven
  - flatbed
  - flatboat
  - flatbread
  - flatcar
  - flatfish
  - flatfoot
  - flathead
  - flatland
  - flatline
  - flatmate
  - flatten
  - flatter
  - flattery
  - flattie
  - flatulent
  - flatus
  - flatware
  - flatwater
  - flatworm
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flatline

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Concise Oxford English Dictionary © 2008 Oxford University Press:
flatline/ˈflatlʌɪn/

▶verb informal

1 (of a person) die.

2 fail to increase; remain static: their share of the vote flatlined at 3%.

– derivatives
flatliner noun.

– origin 1980s: with ref. to the continuous straight line displayed on a heart monitor which indicates cardiac arrest or death.

'flatline' also found in these Oxford entries:

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