tty /T-T-Y/, /tit'ee/ n.
The latter pronunciation was primarily ITS, but some Unix
people say it this way as well; this pronunciation is
not considered to have sexual undertones. 1. A terminal
of the teletype variety, characterized by a noisy mechanical
printer, a very limited character set, and poor print quality.
Usage: antiquated (like the TTYs themselves). See also bit-paired keyboard. 2.
[especially Unix] Any terminal at all; sometimes used to refer to
the particular terminal controlling a given job. 3. [Unix] Any
serial port, whether or not the device connected to it is a
terminal; so called because under Unix such devices have names of
the form tty*. Ambiguity between senses 2 and 3 is common but
seldom bothersome.