- to attack (used especially in commanding a dog): Sic 'em!
- to incite to attack (usually followed by on).
- such.
- so; thus: usually written parenthetically to denote that a word, phrase, passage, etc., that may appear strange or incorrect has been written intentionally or has been quoted verbatim: He signed his name as e. e. cummings (sic).
- Standard Industrial Classification: a system used by the federal government to classify business activities for analytical and reporting purposes.
- Sicilian.
- Sicily.
- so or thus: inserted in brackets in a written or printed text to indicate that an odd or questionable reading is what was actually written or printed
- to turn on or attack: used only in commands, as to a dog
- to urge (a dog) to attack
- a Scot word for such
