/ ˌmɒnˈtɑːʒ; ˈmɒn-; NAmE ˌmɑːnˈtɑːʒ/ noun
1.
[ C ] a picture, film / movie or piece of music or writing that consists of many separate items put together, especially in an interesting or unusual combination :
a photographic montage
2.
[ U ] the process of making a montage
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WORD ORIGIN
early 20th cent.: French , from monter to mount.