Definition of "Dalek"
Dalek
noun
plural Daleks
(science fiction) A member of a species of extraterrestrial cyborg mutants who appear in the television programme Doctor Who and are known for travelling in metallic shells, having monotone, mechanically distorted voices, repeating a limited number of phrases, and their fanatical obsession with exterminating other, non-Dalek beings.
Quotations
'But Alydon,' I persisted, 'the Daleks aren't human beings. They're just evil, half creatures, half machines, determined to destroy you.'
1964, David Whitaker, Dr. Who and the Daleks, chapter 6 (based on the film script Dr. Who and the Daleks by Milton Subotsky, based itself on the tele-script The Mutants/The Daleks by Terry Nation)
My voice still insisted on disappearing into my shoes every time it happened so that I sounded like a Dalek, but with a bit of experience behind me I felt marginally more confident.
2000, Rosie Parnell (Rosie White), The Crit: An Architecture Student's Handbook (co-written with Charles Doidge, Rachel Sara), page xii
Then the Dalek turned and picked off the other passengers one by one. It screamed... 'Exterminate! Exterminate! Exterminate!'
2006, Gareth Roberts, chapter 9, in I Am a Dalek
(figuratively) One who is dogmatic, unfeeling and determined.
Quotations
And rightly so, if only out of respect for the numerous idiosyncrasies left out of any generalized model of behaviour and, if only out of sheer personal honesty in admitting that individuals are never like the streamlined daleks of psychometric regressions.
1981, Kjell Raaheim, Janek Wankowski, Helping Students to Learn at University
In a remarkable speech in 2006, Ray criticised 'factional Daleks' and 'the Stasi element' — apparatchiks 'highly professional and proficient but with no Labor soul'.
2010, Laurie Oakes, On the Record: Politics, politicians and power, Hachette UK