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Verb: flatline
  1. [informal] Cease to live; lose all bodily attributes and functions necessary to sustain life
    - die, decease [archaic], perish, go, exit, pass away, expire, pass, kick the bucket [informal], cash in one's chips [informal], buy the farm [N. Amer, informal], conk [informal], give-up the ghost [informal], drop dead, pop off [informal], choke, croak [informal], snuff it [informal], pop one's clogs [informal]
     
  2. Remain at a low level without increasing
    "the shares flatlined"

Derived forms: flatlined, flatlines, flatlining

Type of: change state, turn

Encyclopedia: Flatline