Webster's Revised Unabridged Dictionary · 1913

Blanch

Blanch (blȧnch) , transitive verb

[Old English blanchen, blaunchen, French blanchir, from blanc white. See Blank, a.]

1.
To take the color out of, and make white; to bleach; as, to blanch linen; age has blanched his hair.
2.
(Gardening) To bleach by excluding the light, as the stalks or leaves of plants, by earthing them up or tying them together.
3.
(a) (Confectionery & Cookery) To make white by removing the skin of, as by scalding; as, to blanch almonds.
(b)
(Confectionery & Cookery) To whiten, as the surface of meat, by plunging into boiling water and afterwards into cold, so as to harden the surface and retain the juices.
4.
To give a white luster to (silver, before stamping, in the process of coining.).
5.
To cover (sheet iron) with a coating of tin.
6.
Figuratively: To whiten; to give a favorable appearance to; to whitewash; to palliate.
Blanch over the blackest and most absurd things. — Tillotson

Blanch (blȧnch) , intransitive verb

To grow or become white; as, his cheek blanched with fear; the rose blanches in the sun.
[Bones] blanching on the grass. — Tennyson

Blanch , transitive verb

[See Blench.]

1.
To avoid, as from fear; to evade; to leave unnoticed. [Obsolete]
Ifs and ands to qualify the words of treason, whereby every man might express his malice and blanch his danger. — Bacon
I suppose you will not blanch Paris in your way. — Reliq. Wot
2.
To cause to turn aside or back; as, to blanch a deer.

Blanch , intransitive verb

To use evasion. [Obsolete]
Books will speak plain, when counselors blanch. — Bacon

Blanch , noun

(Mining) Ore, not in masses, but mixed with other minerals.