The crossword solution for the term 'prefix with glider' is PARA, which is a four-letter word. PARA is a prefix that means 'beside, near, or beyond'. It is commonly used in aviation to refer to a type of glider, which is an aircraft that has no engine and relies on air currents to stay aloft. The prefix PARA is often used to describe a type of glider that is designed to be towed behind another aircraft, such as a powered plane, and released at a certain altitude.