pinafore dress

noun

British a sleeveless dress worn over a blouse or sweaterOften shortened to: pinafore US and Canadian name: jumper
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012