minify

verb ! Definition from Wiktionary (CC BY-SA). More about minify at Wordnik → Where our words come from →

1. To make smaller.
2. To reduce in apparent size, as for example objects viewed through a lens or mirror shaped so as to increase the field of view, such as a convex or aspheric mirror or a Fresnel lens.
3. To remove white space and unnecessary characters from source code in order to reduce its size.