Definition of bulldog

• n. - A variety of dog, of remarkable ferocity, courage, and tenacity of grip; -- so named, probably, from being formerly employed in baiting bulls.
• n. - A refractory material used as a furnace lining, obtained by calcining the cinder or slag from the puddling furnace of a rolling mill.
• a. - Characteristic of, or like, a bulldog; stubborn; as, bulldog courage; bulldog tenacity.
• n. - A variety of dog, of remarkable ferocity, courage, and tenacity of grip; -- so named, probably, from being formerly employed in baiting bulls.
• n. - A refractory material used as a furnace lining, obtained by calcining the cinder or slag from the puddling furnace of a rolling mill.
• a. - Characteristic of, or like, a bulldog; stubborn; as, bulldog courage; bulldog tenacity.