accident

noun

• An unexpected event with negative consequences occurring without the intention of the one suffering the consequences.

  "to die by an accident"

• Especially, a collision or similar unintended event that causes damage or death.

  "My insurance went up after the second accident in three months."

• Any chance event.
• Chance.
• Any property, fact, or relation that is the result of chance or is nonessential.

  "Beauty is an accident."

• An instance of incontinence.
• An unintended pregnancy.
• A quality or attribute in distinction from the substance, as sweetness, softness.
• (grammar) A property attached to a word, but not essential to it, such as gender, number, or case.
• An irregular surface feature with no apparent cause.
• A sudden discontinuity of ground such as fault of great thickness, bed or lentil of unstable ground.
• A point or mark which may be retained or omitted in a coat of arms.
• Casus; such unforeseen, extraordinary, extraneous interference as is out of the range of ordinary calculation.
• Appearance, manifestation.