A squib is a small explosive charge, and a squib actuated valve is one that uses such a small charge to effect rapid operation of the valve to either open (the usual case) or to close. These valves are used, for example, in fire suppression systems, and in devices such as torpedoes to initiate rapid start up of the propulsion system.

A squib is someone who is a son/daughter of a wizard family, or both parents are wizards. And they no magical ability whatsoever, Filch is a squib.

A squib is someone who is a son/daughter of a wizard family, or both parents are wizards. And they no magical ability whatsoever, Filch is a squib.

A squib is someone who comes from a magical family who is non-magical.

Cyril 'Squib' Burton was born on 1908-01-16.