Definition from Wiktionary, the free dictionary
1871, US, named for polka dance, which was popular at the time (1840–1890). Numerous other products were named for the dance, but have not endured.
- Any of a number of uniform round dots, repeated to make a regular geometric pattern on a fabric
uniform round dots forming a pattern on fabric
- “All the while doing the Postal Polka Two-Step.”, The Word Detective