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impress something (up)on someone
to make someone fully aware of something. (Upon is formal and less commonly used than on.) You must impress these facts upon everyone you meet. She impressed its importance on me.
impress something (up)on something
to press something into the surface of something, leaving a mark. The ribbing of my socks impressed a pattern upon my calves. The heavy vase impressed its outline on the pine tabletop.
impress onor impress upon
1. To produce something, as a mark or pattern, on a surface by pressure; imprint something on a surface: We impressed the stencil outline on the fabric.
2. To impart a strong or vivid impression of something in the mind of someone: The singing coach impressed her theories of music on me.