a type of picture frame in which the sides of the frame cross each other and project outwards
Oxford frame in American English
noun
a frame for a picture, mirror, etc., consisting of four straight pieces whose ends project beyond the corners
Word origin
[1870–75]This word is first recorded in the period 1870–75. Other words that entered Englishat around the same time include: Victorian, asymmetric, giveaway, linkage, upgrade