flushable adjective 2noun 1forms 3 adjective2 •Of a product, designed to be disposed of by flushing down the toilet.Dispose of these pads carefully; they're not flushable. •Of a toilet, that has a flushing mechanism.It's such a relief to find a flushable toilet in this bathroom. noun1 •A wipe or similar product designed to be disposed of by flushing down the toilet. formsflushables · more flushable · most flushable