preview

Short definition from Wiktionary

Noun

1. 1
   An experience of something in advance.
2. 2
   An advance showing of a film, exhibition etc.
3. 3
   A short collection of clips edited together to advertise a film, television show, etc.; a trailer.
4. 4
   Something seen in advance.
5. 5
   A facility for viewing and checking a document or photo, or changes to it, before saving or printing it.

Verb

1. 1
   To show or watch something, or part of it, before it is complete.
2. 2
   To show something in advance, a facility for viewing and checking a document or photo, or changes to it, before saving or printing it.