D defs.my
Entry 2 senses Webster, 1913

miscalculation

· mis·cal·cu·la·tion · IPA /mɪskˈælkjəlˈeɪʃən/
01 n. a mistake in calculating.
  1. 1.
    a mistake in calculating.
  2. 2.
    An error in judgment, especially about the effects of action or the likely course of events; as, IBM's miscalculation about the impact of microcomputers cost them many billions in lost opportunities; Sadam's invasion of Kuwait was only his worst, but not his last, miscalculation.