The term 'knocked off' can be defined as being removed or eliminated, and can be used in a variety of contexts. The crossword solutions for this term are SLAIN (5 letters), SLEW (4 letters), COPIED (6 letters), ICED (4 letters), DIDIN (5 letters), and SLEPT (5 letters). SLAIN is a verb meaning to kill someone, usually violently. SLEW is a verb meaning to kill a large number of people or animals. COPIED is a verb meaning to imitate or replicate something. ICED is a verb meaning to kill someone, usually with a firearm. DIDIN is a verb meaning to hit or strike someone. Finally, SLEPT is a verb meaning to be hit or struck with a blunt object. All of these words can be used to describe the act of being knocked off.