a frame for a picture, mirror, etc., consisting of four straight pieces whose ends project beyond the corners.
Origin of Oxford frame
First recorded in 1870–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a type of picture frame in which the sides of the frame cross each other and project outwards
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