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Definition of 'vanishing'

noun

A sudden or mysterious disappearance

noun

A sudden disappearance from sight

From: GCIDE

Vanish \Van"ish\ (v[a^]n"[i^]sh), v. i. [imp. & p. p. Vanished (v[a^]n"[i^]sht); p. pr. & vb. n. Vanishing.] [OE. vanissen, OF. vanir (in comp.): cf. OF. envanir, esvanir, esvanu["i]r, F. s'['e]vanouir; fr. L. vanus empty, vain; cf. L. vanescere, evanescere, to vanish. See Vain, and cf. Evanescent,-ish.] [1913 Webster]
1. To pass from a visible to an invisible state; to go out of sight; to disappear; to fade; as, vapor vanishes from the sight by being dissipated; a ship vanishes from the sight of spectators on land. [1913 Webster]
The horse vanished . . . out of sight. --Chaucer. [1913 Webster]
Go; vanish into air; away! --Shak. [1913 Webster]
The champions vanished from their posts with the speed of lightning. --Sir W. Scott. [1913 Webster]
Gliding from the twilight past to vanish among realities. --Hawthorne. [1913 Webster]
2. To be annihilated or lost; to pass away. "All these delights will vanish." --Milton. [1913 Webster]

From: GCIDE

Vanishing \Van"ish*ing\, a. & n. from Vanish, v. [1913 Webster]
Vanishing fraction (Math.), a fraction which reduces to the form 0/0 for a particular value of the variable which enters it, usually in consequence of the existence of a common factor in both terms of the fraction, which factor becomes 0 for this particular value of the variable. --Math. Dict.
Vanishing line (Persp.), the intersection of the parallel of any original plane and the picture; one of the lines converging to the vanishing point.
Vanishing point (Persp.), the point to which all parallel lines in the same plane tend in the representation. --Gwilt.
Vanishing stress (Phon.), stress of voice upon the closing portion of a syllable. --Rush. [1913 Webster]