A function key is a key on a computer or terminal keyboard which can be programmed so as to cause an operating system command interpreter or application program to perform certain actions, a form of soft key. On some keyboards/computers, function keys may have default actions, accessible on power-on.
Surge definition, a strong, wavelike, forward movement, rush, or sweep: the onward surge of an angry mob. See more.
1 An example of a surge is a crowd that suddenly and quickly moves forward. 2  An example of a surge is a sudden increase of electric current or voltage. 3  An example of a surge is when a companies profits go from $100,000 to $1,000,000. 4  An example of a surge is the act of being overcome with happiness and other emotions.