Real Dictionary

contact
the act or state of touching physically [...]
the space between two straight lines that diverge from a common point or between two planes that extend from a common line [...]
Your contact details or number are information such as a phone number where you can be contacted.
uncountable noun: Contact involves meeting or communicating with someone, especially regularly.
verb: If you contact someone, you phone them, write to them, or go to see them in order to tell or ask them something.