What does slewing mean?
Slewing means turning or rotating something, usually with a controlled or mechanical motion. It is particularly associated with objects that pivot around a fixed point, such as cranes, heavy machinery, cameras, and radar installations. The word can also describe a vessel changing direction while moving through the water, although nautical usage may distinguish this motion from sliding sideways. In everyday conversation, turn or rotate is generally more natural, but slewing conveys a more deliberate or specialized process. The term is especially useful in engineering, maritime, filming, and broadcast contexts, where precise directional movement matters. As a present participle, it appears in phrases such as slewing the crane into position and describes an action in progress without necessarily implying continuous rotation.
verbTo turn or rotate continuously, especially a heavy object, a camera, or a vessel. In nautical usage, it refers to a ship turning to a new course.
- To turn or rotate, especially a heavy or mounted object.
- To turn a ship or boat through the water so that it changes direction.
"The crane slewed the container into position beside the truck."
"The operator slewed the crane boom towards the loading bay."
"The vessel slewed slowly as it entered the narrow channel."
From camera crews to dockyard cranes, slewing describes the controlled rotation of something large, awkward, or precisely mounted.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does slewing come from?
The verb comes from the older English verb slew, which has long been used for turning or pivoting. Its modern technical and nautical senses developed alongside uses involving ships and heavy mounted machinery. The exact early development of the word is less transparent than its established modern meanings.
Related word forms
How slewing is actually used
Slewing is the present participle of slew and is especially common in technical, nautical, engineering, and broadcast-production contexts. In general speech, turn is more usual.
Easily confused with slewing
Slewing means turning or pivoting, whereas sluing means moving a vessel sideways through the water or adjusting its direction in that manner.