A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.
The breaching of the skin barrier.
The spread of cancer cells, bacteries and such to the organism.
The entry without consent of an individual or group into an area where they are not wanted.
Coverage.
A means of keeping or remaining safe.
The process of keeping (something or someone) safe.
The state of being safe.
An instance of a security token associated with a resource (such as a file).
Restrictions on foreign competitors which limit their ability to compete with domestic producers of goods or services.
A means, such as a condom, of preventing pregnancy or sexually transmitted disease.
Immunity from harm, obtained by illegal payments, as bribery or extortion.