foreground

Short definition from Wiktionary

Noun

1. 1
   The elements of an image which lie closest to the picture plane.
2. 2
   The subject of an image, often depicted at the bottom in a two-dimensional work.
3. 3
   The application the user is currently interacting with; the application window that appears in front of all others.

Verb

1. 1
   To place in the foreground (physically or metaphorically).