Longman Dictionary of Contemporary English
Wiktionary
n. 1 (&lit dead wood English) 2 (context uncountable idiomatic management English) Personnel no longer contributing to an organization.
Wikipedia
Dead Wood is a 2007 British horror film, written, produced and directed by Sebastian Smith, Richard Stiles and David Bryant and starring Emily Juniper, Fergus March, Rebecca Craven, Nina Kwok and John Samuel Worsey with Bryant appearing in a small role. Dead Wood was shown at film festivals across Italy, the UK and the United States, before being released on DVD throughout Europe and North America in 2009.
Dead Wood is a 2009 novel by the British writer Chris Longmuir. It won the Dundee International Book Prize, the largest monetary British Prize for first novels, in 2009, and was published by Polygon Publishing. The novel is based upon the unsolved murders of 18-year-old Carol Lannen and 20-year-old Elizabeth McCabe in Scotland during the 1970s.