Definify.com
Webster 1913 Edition
Bolting
Bolt′ing
,Noun.
 A darting away; a starting off or aside. 
 Bolt′ing
,Noun.
 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.
 Webster 1828 Edition
Bolting
BOLTING
,ppr.
  BOLTING
,Noun.