a stand or frame for supporting or displaying at an angle an artist's canvas, a blackboard, a china plate, etc.
2.
Also called masking frame.Photography. a frame, often with adjustable masks, used to hold photographic paper flat and control borders when printing enlargements.
Origin: 1625–35; < Dutchezel ass, easel (cognate with GermanEsel,Old Englishesel ass) < Vulgar Latin*asilus, for Latinasellus, diminutive of asinusass1
1590s, from Du. ezel "easel," originally "ass," from M.Du. esel, from L. asinus "ass" (see ass (1)); the comparison being of loading a burden on a donkey and propping up a painting or canvas on a wooden stand.