rhinestone /ˈɹaɪnˌstoʊn/adjective 1noun 1verb 1forms 3 adjective1 •Made of or encrusted with rhinestones.Karl wore a cowboy hat with a rhinestone hatband when he played his country and western gigs. noun1 •A diamond simulant, strass.Lucinda sewed rhinestones into her scarf to add a bit of flair. verb1 •To decorate with rhinestones. formsrhinestoned · rhinestoning · rhinestones