English Expression · Intermediate
jack block
A block fixed in the topgallant or royal rigging, used for raising and lowering light masts and spars
Pronunciation: say jack block
Meaning
A block fixed in the topgallant or royal rigging, used for raising and lowering light masts and spars.
Example
The crew used a jack block to hoist the heavy topgallant mast into position.
The crew used a jack block to hoist the heavy topgallant mast into position.
Practice tips
- Practice jack block out loud — read the pronunciation guide above and repeat.
- Use it in your own sentence today; reuse beats rereading.
- Pay attention to context: this English expression is for intermediate-level learners.