No. A citation simply gives credit to the source you are obtaining the information from. For example if someone cited "[quote]," then there should be an in-text parenthetical citation. In MLA format, this is given as the last name of the author and page number surrounded by parentheses. For example, "Quote quote quote" (Brains 1).
The word "gross" in this line from Frederick Douglas's famous speech named <span>“What to the Slave Is the Fourth of July?” </span>means flagrant or extreme. This term is often used with the word "injustice" and it means unacceptable and obvious which is definition for flagrant as well.