Definition of "mark out"

mark out

verb
third-person singular simple present marks out, present participle marking out, simple past and past participle marked out
1. (transitive) to set the boundaries of an area
2. (transitive) to classify
3. (transitive) to obliterate or cancel with a mark
4. (transitive) to distinguish
  Quotations
  The killing of more than 90 journalists in Iraq in 43 months after the invasion was to mark it out as one of the deadliest conflicts to cover.
  2007, Naomi Sakr, Arab Television Today