English Dictionary
that is
adv : that is to say; in other words [syn: {i.e.}, {ie}, {id est}]
English Computing Dictionary
whatis
1. A {Unix} command which searches for a given string
in the headings of all {man} pages.
2. A command which searches the {archie} {Software Description
Database} for a given string, with case being ignored.
(1995-11-12)