from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A small powerful boat designed for towing or pushing larger vessels. Also called towboat.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A small, powerful boat used to push or pull barges or to help maneuver larger vessels.
from the GNU version of the Collaborative International Dictionary of English
- n. See tug, n., 3.
from The Century Dictionary and Cyclopedia
- n. A strongly built steamboat used for towing sailing and other vessels; a towboat; a tug.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a powerful small boat designed to pull or push larger ships
From tug + boat. (Wiktionary)