v.1. To simulate movement toward an object with or as if with a zoom lens: The director zoomed in on a face in the crowd. The shot zooms in through a window to a family sitting at a table.
2. To increase the apparent size of part of an image of something in order to view it more closely, as when using a magnifying lens: The camera can't zoom in far enough to capture their expressions. Zoom in on this part of the document too see whether the text lines up with the illustration.
3. To enter rapidly: The firefighting helicopter zoomed in to pick up more water.
4. zoom in on To narrow and intensify the examination of someone or something: In our presentation we zoomed in on the financial problems facing the company.