We found 26 dictionaries that define the word tugboat:

General (21 matching dictionaries)

1. tugboat: Merriam-Webster
2. tugboat: Oxford Learner's Dictionaries
3. tugboat: American Heritage Dictionary of the English Language
4. tugboat: Collins English Dictionary
5. tugboat: Vocabulary.com
6. Tugboat, tugboat: Wordnik
7. tugboat: Cambridge Advanced Learner's Dictionary
8. tugboat: Wiktionary
9. tugboat: Webster's New World College Dictionary, 4th Ed.
10. tugboat: The Wordsmyth English Dictionary-Thesaurus
11. tugboat: Infoplease Dictionary
12. tugboat: Dictionary.com
13. tugboat: Cambridge Essential American English Dictionary
14. TUGboat, Tugboat (disambiguation), Tugboat (wrestler), Tugboat: Wikipedia, the Free Encyclopedia
15. Tugboat: Online Plain Text English Dictionary
16. tugboat: Webster's Revised Unabridged, 1913 Edition
17. tugboat: Rhymezone
18. tugboat: AllWords.com Multi-Lingual Dictionary
19. tugboat: FreeDictionary.org
20. tugboat: Mnemonic Dictionary
21. tugboat: TheFreeDictionary.com

Computing (1 matching dictionary)

22. tugboat: Encyclopedia

Medicine (1 matching dictionary)

23. tugboat: Medical dictionary

Miscellaneous (1 matching dictionary)

24. tugboat: Idioms

Slang (2 matching dictionaries)

25. Totally Unofficial Rap (No longer online)
26. The Tugboat, tugboat: Urban Dictionary

(Note: See tugboating as well.)

Definitions from Wiktionary (tugboat) ▸ noun:  (nautical) A small, powerful boat used to push or pull barges or to help maneuver larger vessels. Similar: towboat, tug, tug-boat, powerboat, pontoon, poleboat, picket boat, picketboat, bid hook, boat hook, more... Types: seagoing tug, harbor tug, icebreaker tug, river tug, canal tug, ocean-going tug, more... Phrases: Theodore Tugboat, Cherokee-class tugboat, Powhatan-class tugboat, Abnaki-class tugboat, tugboat sounds, more... Adjectives: little, small, old, powerful, large, single, tiny, foot, passive, red, oceangoing ▸ Words similar to tugboat ▸ Usage examples for tugboat ▸ Idioms related to tugboat ▸ Wikipedia articles (New!) ▸ Popular adjectives describing tugboat ▸ Words that often appear near tugboat ▸ Rhymes of tugboat ▸ Invented words related to tugboat