Variables. A variable is a symbolic name for (or reference to) information. The variable's name represents what information the variable contains. They are called variables because the represented information can change but the operations on the variable remain the same. In general, a program should be written with Symbolic notation, such that a statement is always true symbolically.
Definition of overwatch. 1  1 archaic : to weary or exhaust by keeping awake. 2  2a obsolete : to watch through or throughout (as the night) b : to watch over. 3  3 : to support by fire another element which is moving tanks overwatching an assault battalion.
Watch(verb) the period of the night during which a person does duty as a sentinel, or guard; the time from the placing of a sentinel till his relief; hence, a division of the night. Watch(verb) a small timepiece, or chronometer, to be carried about the person, the machinery of which is moved by a spring.