Functions as an adverb meaning “thus”; chiefly used in brackets or parentheses to mark exact reproduction of a quoted passage.
Определения
Thus; used within brackets or parentheses after a quoted word or passage to indicate that it is reproduced exactly as in the source, including any errors.
The notice read "Keep off the grasss [sic]" with the extra 's' preserved.
Thus; in such a manner (archaic or literary, occasionally used outside of brackets).