Definition of slighting:
(adj) :
In the manner of a slight; belittling, deprecative
(n) :
The act of giving a slight or snub.
(n) :
(regional) An act of ignoring or neglecting someone or something; more broadly neglect.
(n) :
(regional) The action of rejecting someone or something; rejection.
(n) :
(military) The full or partial demolition of a fortification.