callable adjective 2noun 2forms 1 adjective2 •That can be called.The list of server tasks is a compromise between only one task for all remotely callable subprograms and one task for each remotely callable subprogram. — 1989 •That may be redeemed by its holder before it matures. noun2 •An object of a type that can be called, such as a function.The ctypes module can be used to create Python callables that wrap around arbitrary memory addresses. — 2013 •A callable bond. formscallables