either of two keys on a PC keyboard that is held down while pressing another key, as to perform a specific operation or type a special character.
noun a genre of rock music regarded by its practitioners and fans as being outside the mainstream noun alternative rock; rock music that is somewhat different than mainstream genres Examples Indie rock is considered alt-rock. Usage Note music
- Alt. hor.
alt. hor. alt. hor. abbr. Latin alternis horis (every other hour) Latin alternis horis (every other hour)
noun a genre of country music originating in the 1990s and influenced by both early country music and contemporary rock music
alt.sources messaging, programming A Usenet newsgroup for posting program source code. Archive (ftp://wuarchive.wustl.edu/usenet/alt.sources/). (1995-10-18)