verb To take the color out of, and make white; to bleach.
to blanch linen
verb To cook by dipping briefly into boiling water, then directly into cold water.
verb To whiten, for example the surface of meat, by plunging into boiling water and afterwards into cold, so as to harden the surface and retain the juices.
verb To bleach by excluding light, for example the stalks or leaves of plants by earthing them up or tying them together.
verb To make white by removing the skin of, for example by scalding.
to blanch almonds
verb To give a white lustre to (silver, before stamping, in the process of coining)