What does jib mean?
A jib is a triangular sail used at the front of a sailing vessel, where it helps the boat move forward and can be adjusted to suit the wind. The word also has a practical engineering meaning: a crane jib is the long, projecting arm that supports the machinery and load being lifted. In sailing contexts, expressions such as “raise the jib” refer to hauling the sail into position, while “jib sail” identifies the sail itself. In crane terminology, the jib may be fixed, luffing, or capable of slewing, depending on the machine. Although the spelling is similar to “jibe,” the two words have unrelated everyday meanings. Knowing both senses of jib is useful because the word links two familiar technologies: traditional sailing and modern construction equipment.
A triangular sail extending forward from a ship's foremast or bowsprit.
"The crew adjusted the jib as the wind shifted."
A nautical term, especially common in sailing and yachting.
A projecting horizontal arm or boom on a crane, used to support and position a load.
"The crane jib lowered the bundle onto the platform."
Common in construction, engineering, and descriptions of lifting equipment.
The plural is used for multiple sails or crane arms.
"The ship carried two jibs in its offshore rig."
A jib is the triangular front sail of a ship—and also the long arm that lets a crane swing its load.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does jib come from?
The word jib has an uncertain recorded origin in English. Its nautical sense is the older and best-established use, and the word was subsequently applied to projecting arms and booms on cranes and other lifting machinery. The related spelling jibe developed in the separate sense of a mocking remark or a playful agreement, so the two words should be treated as distinct despite their similar pronunciation.
How jib is actually used
In sailing terminology, the word is primarily nautical. In engineering and construction, it is commonly used for the projecting arm of a crane. It should not be confused with “jibe,” which can mean to mock or to move in agreement.
Easily confused with jib
A jib is a sail or crane arm, whereas a jibe is a remark or movement that mocks, criticizes, or agrees playfully with something.