from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A setback or reversal.
- n. An eddy or countercurrent in water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To plow again in the fall; said of prairie land broken up in the spring.
from the GNU version of the Collaborative International Dictionary of English
- n. A check; a relapse; a discouragement; a setback.
- n. Whatever is thrown back in its course, as water.
- transitive v. To plow again, in the fall; -- said of prairie land broken up in the spring.
from The Century Dictionary and Cyclopedia
- To set upon in the rear.
- To plow again, in the autumn, prairie-land which has been plowed for the first time in the preceding spring.
- n. A setting back or backward, as the result of some untoward circumstance or opposing agency; a check to progress; retardation, or the losing of ground; a relapse: as, he suffered more than one serious backset; a backset which appeared to be fatal.
- n. An eddy or counter-current in flowing water.
- n. In lock-making, the horizontal distance between the front of the lock and the center of the keyhole: an essential measurement in lock-fitting.
back + set? (Wiktionary)