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Wiktionary
block out

vb. 1 (context transitive English) to prevent from entering or penetrating 2 (context idiomatic transitive English) to prevent (a thought) from entering one's mind. 3 (context transitive English) to cover something, so as to make it impossible to see. 4 (context transitive English) to begin to reduce to shape; to mark out roughly; to lay out.

WordNet
block out
  1. v. plan where and when songs should be inserted into a theatrical production, or plan a theatrical production in general

  2. prevent from entering; "block out the strong sunlight" [syn: screen]

  3. shield from light [syn: mask]

  4. indicate roughly; "We sketched out our plan"

Wikipedia
Block Out (band)

Block Out was an alternative rock band from Belgrade, Serbia. Their musical style was a combination of artistic alternative rock, punk rock, doom metal and psychedelic rock. The band was one of the few representatives of grunge music in Serbia.

Block Out (video album)

Block Out DVD is the self-titled DVD release by the Serbian alternative rock band Block Out. The DVD, featuring the December 23, 2005 Dom Omladine live recording and all the promotional videos the band recorded throughout their career, was released by Multimedia records in 2007.