The Collaborative International Dictionary of English v.0.48:

focused \focused\ adj. [Also spelled focussed.]
   1. being in focus or brought into focus; clearly delineated;
      -- of an image. Opposite of unfocused.
      [WordNet 1.5]

   2. converging on a point; -- of light rays; as, focused light
      rays can set something afire.
      [WordNet 1.5]

   3. concentrated on or clustered around a central point or
      purpose.

   Syn: centered, centred, centralized.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

focussed \focussed\ adj.
   1. same as focused (in all senses).

   Syn: focused.
        [WordNet 1.5] focusing

WordNet (r) 3.0 (2006):

focussed
    adj 1: being in focus or brought into focus [syn: focused,
           focussed] [ant: unfocused, unfocussed]
    2: (of light rays) converging on a point; "focused light rays
       can set something afire" [syn: focused, focussed]