dross Get Printable Handwriting (dross) 1 syllables Learn It! Spelling Test Definition noun. 1 anything that is worthless or useless; rubbish; 2 impurities formed on melted metal. 3 the scum that forms on the surface of molten metal Example Sentence They need to remove the dross from the coils. Synonyms trash; rubbish; remains Antonyms cleanliness; neatness; purity Share with your friends: