penetration

Short definition from Wiktionary

Noun

1. 1
   The act of penetrating something.
2. 2
   The insertion of the penis (or similar object) during sexual intercourse.
3. 3
   The act of penetrating a given situation with the mind or faculties; perception, discernment.
4. 4
   The act of progressing or moving forward through or into something.
5. 5
   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.
6. 6
   The proportion of the target audience who buy or use the specified product or service.