1. a person who views or examines something in advance
2. a software application or feature that displays content before it is finalized or published
Usage: computing

Examples

• The movie previewer watched the film before its official release.
• She worked as a previewer for the publishing company.
• The document previewer shows how the page will look when printed.
• Use the image previewer to check the photo quality.
• The email previewer displays messages without opening them fully.
• The previewer caught several errors in the manuscript.
• This PDF previewer works with most file formats.