fusible /ˈfjuːzɪbl̩/adjective 1noun 1forms 3 adjective1 •Able to be fused or melted. noun1 •Any substance that can be fused or melted.Try any fusibles you have on hand, making sure that they aren't too stiff for the project you have in mind. — 2010 formsfusibles · more fusible · most fusible