What does CONTACT mean?

noun

1. close interaction“they kept in daily contact”
2. the act of touching physically“her fingers came in contact with the light switch”
3. the state or condition of touching or of being in immediate proximity“litmus paper turns red on contact with an acid”
4. the physical coming together of two or more things“contact with the pier scraped paint from the hull”
5. a person who is in a position to give you special assistance“he used his business contacts to get an introduction to the governor”
6. a channel for communication between groups“he provided a liaison with the guerrillas”
7. (electronics) a junction where things (as two electrical conductors) touch or are in physical contact“they forget to solder the contacts”
8. a communicative interaction“the pilot made contact with the base”