Definify.com
Webster 1913 Edition
Notching
Notch′ing
,Noun.
 1. 
The act of making notches; the act of cutting into small hollows. 
2. 
The small hollow, or hollows, cut; a notch or notches. 
3. 
(Carp.) 
A method of joining timbers, scantling, etc., by notching them, as at the ends, and overlapping or interlocking the notched portions. 
4. 
(Engin.) 
A method of excavating, as in a bank, by a series of cuttings side by side. See also 
Gulleting
.