castable adjective 5noun 1forms 3 adjective5 •Able to be cast. •Capable of or suitable for being assigned a role in a play, film, etc.I always assumed that I'd be more castable as I got older. I'm a character actress and a comedian —not some pretty little ingénue. I figured I'd grow[…] — 2009 •Capable of being cast, as in a mould. •Capable of being performed and brought forth (as a spell or magic). •Capable of being cast to another data type. noun1 •Any substance that can be cast, as in a mould. formscastables · more castable · most castable