Historically, several aircraft were designated bomber destroyers prior and during the Second World War. They were interceptor aircraft dedicated to destroy enemy bomber aircraft with exceptionally powerful armament. They were a generally intended for day use, so were a separate category from the existing night fighters.
A deceptively similar, although completely different, designation was the German Zerstörer (meaning "destroyer"). Introduced on 1 May 1939, the term did specifically exclude the defensive anti-bomber role (leaving it for the light fighters), and envisaged a heavy fighter for offensive missions: escorting the bombers, long-range fighter suppression, and ground attack.
Since then, improvements in both engine power and armament generally led to a loss of interest in this class for most nations. Even small fighters were able to carry enough firepower to effectively deal with enemy bombers. This remains true even today.
See also 
||This article needs additional citations for verification. (January 2007)|
- Weal, John (1999). Messerschmitt Bf 110 Zerstörer aces of World War 2. Oxford: Osprey Aviation. pp. 6–7. ISBN 1-85532-753-8.