1. the spontaneous loss of a pregnancy before the fetus can survive outside the womb
Usage: medical
2. failure to achieve an intended result or outcome
Usage: formal

Examples

• She suffered a miscarriage in her second trimester.
• The doctor explained that miscarriages are unfortunately common in early pregnancy.
• After the miscarriage, they decided to wait before trying again.
• The trial ended in a miscarriage of justice.
• The project’s failure was a miscarriage of good intentions.
• Many viewed the verdict as a complete miscarriage of justice.