From The Collaborative International Dictionary of English v.0.48 [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]
From The Collaborative International Dictionary of English v.0.48 [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 WordNet (r) 3.0 (2006) [wn]:
vanishing
n 1: a sudden or mysterious disappearance
2: a sudden disappearance from sight
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