What is a contact?

One of your existing customers
Anybody your company markets to, sells to, partners with, engages with, or employs
A person sent by the intelligence agency of his or her own country who approaches an intelligence agency in the hope of being recruited as a spy
A piece of software or a platform that helps you keep track of your leads, prospects, and customers

The correct answer is:

Anybody your company markets to, sells to, partners with, engages with, or employs.