\Bolt"ing\, n.
A darting away; a starting off or aside.

\Bolt"ing\, n.
1. A sifting, as of flour or meal.

2. (Law) A private arguing of cases for practice by students,
   as in the Inns of Court. [Obs.]

{Bolting cloth}, wire, hair, silk, or other sieve cloth of
   different degrees of fineness; -- used by millers for
   sifting flour. --McElrath.

{Bolting hutch}, a bin or tub for the bolted flour or meal;
   (fig.) a receptacle.