Malicious waste or destruction of an employer's property or injury to his interests by workmen during labor troubles.

any surreptitious destruction of property or obstruction of activity by persons not known to be hostile; -- in war, such actions carried out behind enemy lines by agents or local sympathisers of the hostile power.

Deliberate act of destruction of property or disruption of normal College operations. Malicious, intentional, and willful destruction or defacing of public or private property.

the deliberate damage or destruction of property.

a deliberate act of destruction or disruption in which equipment is damaged

destroy property or hinder normal operations; "The Resistance sabotaged railroad operations during the war"

Willful destruction of war or national defense material.

Malicious actions not committed by the insured which are aimed at preventing the normal functioning of a service or enterprise or of impeding communications.

a deliberate act that causes the damage or destruction of computer hardware or software

Sabotage is a deliberate action aimed at weakening an enemy, oppressor or employer through subversion, obstruction, disruption, and/or destruction.