The act or process of piercing or penetrating something, especially: a. The act of entering a country or organization so as to establish influence or gain information.b. An attack that penetrates enemy territory or a military front.c. Insertion of the penis into the vagina or anus.2. The power or ability to penetrate.3. The depth reached by a projectile after hitting its target.4.a. The degree to which a commodity, for example, is sold or recognized in a particular market.b. The extent of influence that one culture or nation has on another.5. The capacity or action of understanding; insight.
