Meaning of underrunner | Babel Free

Definitions

1. The lower of a pair of grinding millstones.
2. An additional runner added to the bottom of a sledge to protect the main runners in harsh conditions.
3. A runner (mechanical part intended to guide or aid something else to move) designed to be inserted underneath the item to be moved.

Examples

“FOR SALE AT A BARGAIN. […] Four run stones, Munson underrunners, 3 ft diameter.”

“The arrangement is preferably applied to an underrunner mill.”

“Less than half a mile to the south the party sighted an underrunner of a sledge, and assumed it to mark the location the Norwegians had assigned for 90°S.”

“A triple tandem tow using underrunners. This method has been used for long ocean tows by tugs with a single-drum winch.”

CEFR level