1 a simple crane having lifting tackle slung from a boom
2 the framework erected over an oil well to enable drill tubes to be raised and lowered
3 to raise or lower the jib of (a crane)
(C17 (in the sense: gallows): from Derrick, name of a celebrated hangman at Tyburn)
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"Collins English Dictionary 5th Edition first published in 2000 © HarperCollins Publishers 1979, 1986, 1991, 1994, 1998, 2000 and Collins A-Z Thesaurus 1st edition first published in 1995 © HarperCollins Publishers 1995"