Definition of "downfall" in English

noun

1. A precipitous decline in fortune; death or rapid deterioration, as in status or wealth.

   • Many economic and political reasons led to the downfall of the Roman Empire.

2. The cause of such a fall; a critical blow or error.

   • Orson Scott Card It is the downfall of evil, that it never sees far enough ahead.

3. An act of falling down.

   • a downfall of rain

verb

1. (intransitive) To fall down; deteriorate; decline.

   • It should be noted that the magnitude of satellites decreases when tuning out of degeneracy, and in the wavelength range of 1.2-1.3 pm it downfalls to the value of 10-15% of the main spike magnitude.