Bouncy castle

What is Bouncy castle?

Bouncy castle definition and meaning on Dictionary terms:
simple past tense and past participle of bind.

tied; in bonds: a bound prisoner.
made fast as if by a band or bond: She is bound to her family.
secured within a cover, as a book.
under a legal or moral obligation: He is bound by the terms of the contract.
destined; sure; certain: It is bound to happen.

determined or resolved: He is bound to go.
Pathology. constipated.
Mathematics. (of a vector) having a specified initial point as well as magnitude and direction.Compare free(def 32).
held with another element, substance, or material in chemical or physical union.
(of a linguistic form) occurring only in combination with other forms, as most affixes.Compare free(def 35).