Sentence:  Only when the collage had been exhaustively translated into oil , and transformed by this translation , did <WSD>Cubism</WSD> become an affair of positive color and flat , interlocking silhouettes whose legibility and placement created allusions to , if not the illusion of , unmistakable three-dimensional identities . 
Meaning of the word marked with <WSD> tags:  an artistic movement in France beginning in 1907 that featured surfaces of geometrical planes