penetration

ot noun

1. The act of penetrating something. Any penetration, however slight, is sufficient to complete the offense.
2. Specifically, the insertion of the penis (or similar object) during sexual intercourse.
3. The act of penetrating a given situation with the mind or faculties; perception, discernment.
4. A number or fraction that represents how many cards/decks will be dealt before shuffling, in contrast to the total number of cards/decks in play.