From Longman Dictionary of Contemporary Englishpolka dotˈpolka dot noun [countable] DCone of a number of round spots that form a pattern, especially on cloth used for clothing a white scarf with red polka dots —polka-dot adjective a polka-dot dress
Examples from the Corpus
polka dot• The Fifties polka dot is also resurrected in a variety of vibrant pinks and purples.• Seven minutes later the princess, dressed in a navy suit and pink and navy polka dot blouse, came out.• Kate's shirt was green with purple polka dots.• A perennial favourite, the polka dot gets a new lease of life in bold emerald green and brilliant white. 