Noun

1. A deliberate action aimed at weakening an enemy through subversion, obstruction, disruption, and/or destruction.
2. An act or acts with intent to injure, interfere with, or obstruct the national defense of a country by willfully injuring or destroying, or attempting to injure or destroy, any national defense or war materiel, premises, or utilities, to include human and natural resources.

Verb

1. to deliberately destroy or damage something in order to prevent it from being successful

   The railway line had been sabotaged by enemy commandos