to disappear from sight, esp. quickly; become invisible

The frost vanished when the sun came out.

to go away, esp. furtively or mysteriously; disappear by quick departure

The thief vanished in the night.

to disappear by ceasing to exist; come to an end

The pain vanished after he took an aspirin.

Mathematics . (of a number, quantity, or function) to become zero.

to cause to disappear.

Phonetics . the last part of a vowel sound when it differs noticeably in quality from the main sound, as the faint (?) at the end of the (?) in the pronunciation of pain.

noun

evanescence , evaporation , fade-out