Noah Webster's New International Dictionary of the English Language

1. (a.) Relating to Italy or to its people.

2. (a.) Applied especially to a kind of type in which the letters do not stand upright, but slope toward the right; -- so called because dedicated to the States of Italy by the inventor, Aldus Manutius, about the year 1500.

3. (n.) An Italic letter, character, or type (see Italic, a., 2.); -- often in the plural; as, the Italics are the author's. Italic letters are used to distinguish words for emphasis, importance, antithesis, etc. Also, collectively, Italic letters.