01 n. A mast, spar, or tall frame, supported at the top by stays or guys, and usually pivoted at the base, with suitable tackle for hoisting heav…
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1.
A mast, spar, or tall frame, supported at the top by stays or guys, and usually pivoted at the base, with suitable tackle for hoisting heavy weights, such as stones in building.
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2.
The pyramidal structure or tower over a deep drill hole, such as that of an oil well (also called an oil derrick).(Mining)
Phrases & compounds
Derrick crane —
a combination of the derrick and the crane, having facility for hoisting and also for swinging the load horizontally.