telnet noun 2verb 1forms 5 noun2 •A network protocol that enables one computer to communicate with another via a local area network or the Internet. •The program that acts as the client for such communication. verb1 •To use such a program to make such a connection.I've been running tin with nano in Terminal in my Mac since 2003, and before then, by telnetting in to my university's server, which I first started doing as a first year undergrad in September 1993. — 2014 formstelneted · telnetted · telneting · telnetting · telnets