The term SCI-FI SETTING can be broken down into five crossword solutions: LAB (3 letters), MARS (4 letters), SPACE (5 letters), STUN (4 letters), and TERRA (5 letters). LAB is an abbreviation for laboratory, which is a place where scientific research is conducted. MARS is the fourth planet from the Sun in our Solar System and is often used as a setting in science fiction stories. SPACE is a vast area that is beyond the Earth's atmosphere and is often used as a backdrop for science fiction stories. STUN is a verb meaning to overwhelm someone with amazement or surprise, which is often used as a plot device in science fiction stories. TERRA is a Latin word meaning Earth, which is also often used as a setting in science fiction stories.