Emily Dickinson Lexicon

TUG, n. [G. zug.]

1. A pull with the utmost effort. At the tug he falls – / Vast ruins come along. Dryden.
2. A sort of carriage, used in some parts of England for conveying bavins or faggots and other things. Cyc.
3. In some parts of New England, the traces of a harness are called tugs.