penetration

Penetration is the act of a penis being put into a vagina or anus.

(noun)

An example of penetration is sex.

Penetration is defined as the depth which something has gotten through, such as military intervention or depth of knowledge or marketing.

(noun)

An example of penetration is the distance that a military force enters into enemy territory.
An example of penetration is the amount that a student actually learned during the math lesson.
An example of penetration is the awareness of a product in a new market.

See penetration in Webster's New World College Dictionary

noun

1. the act, power, or an instance of penetrating
2. the act or an instance of inserting the penis into the vagina or anus
the depth to which something penetrates, as a military force into enemy territory
the extension of the influence of a country over a weaker one by means of commercial investments, loans, diplomatic maneuvers, etc.
keenness of mind; discernment; insight

Origin: LL penetratio

See penetration in American Heritage Dictionary 4

noun

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.
The power or ability to penetrate.
The depth reached by a projectile after hitting its target.
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.
The capacity or action of understanding; insight.