blue devils Meaning, Definition & Usage

  1. noun a state of depression
    vapours; blues; vapors; megrims.
    • he had a bad case of the blues
  2. noun a coarse prickly European weed with spikes of blue flowers; naturalized in United States
    viper's bugloss; blue thistle; blue devil; Echium vulgare; blueweed.
  3. noun the sodium salt of amobarbital that is used as a barbiturate; used as a sedative and a hypnotic
    blue; blue angel; Amytal; blue devil; amobarbital sodium.

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