Final answer:
The term used by Modernist figures for rejecting the past and looking forward with their art is avant-garde.
Explanation:
Avant-Garde: The term used by Modernist figures to reject the Classical past and look forward with their art is avant-garde. Originating as a military term, it describes artists who pioneer radical techniques and subjects, distancing themselves from traditional styles. The avant-garde encompasses various art movements focused on artistic autonomy and independence.
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