A blaster was a type of weapon.
In one occasion, the Fourth Doctor complained about always meeting people "pointing guns or phasers or blasters" during his travels across the universe. (TV: The Horns of Nimon)
Grimmon carried a blaster. When he crash-landed in ancient Athens, he was attacked by two men with spears. He shot his blaster at them, and they disintegrated. Grimmon was surprised by this, because the blaster had been on its lowest setting. (PROSE: The Brain of Socrates)
Threllips used radium-powered blasters capable of destroying entire forests. (AUDIO: Living Legend)
K9 Mark II's blaster ray had an accuracy of 98%. (AUDIO: Ascension)
Raxacoricovarlonpatorians participating in the Grand Raxian Hunt wielded blasters. (COMIC: Doctormania)
Blasters were also used by Earth Alliance forces during the Cyberon War, as well as laser pistols. (AUDIO: Curse of the Cyberons)