Definition of basilisk

• n. - A fabulous serpent, or dragon. The ancients alleged that its hissing would drive away all other serpents, and that its breath, and even its look, was fatal. See Cockatrice.
• n. - A lizard of the genus Basiliscus, belonging to the family Iguanidae.
• n. - A large piece of ordnance, so called from its supposed resemblance to the serpent of that name, or from its size.
• n. - A fabulous serpent, or dragon. The ancients alleged that its hissing would drive away all other serpents, and that its breath, and even its look, was fatal. See Cockatrice.
• n. - A lizard of the genus Basiliscus, belonging to the family Iguanidae.
• n. - A large piece of ordnance, so called from its supposed resemblance to the serpent of that name, or from its size.