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.