We found 30 dictionaries that define the word lassie:

General (23 matching dictionaries)

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

Art (1 matching dictionary)

22. Encyclopedia of Television (No longer online)

Computing (1 matching dictionary)

23. Lassie (1997), Lassie: Encyclopedia

Miscellaneous (2 matching dictionaries)

24. baby names list (No longer online)
25. LASSIE: Acronym Finder

Slang (3 matching dictionaries)

26. Lassie (offensive): Racial Slur Database
27. lassie: Green’s Dictionary of Slang
28. lassie: Urban Dictionary

(Note: See lassies as well.)

Definitions from Wiktionary ( ) ▸ noun:  (chiefly Scotland, Northern England, Geordie, Northumbria) A young girl, a lass, especially one seen as a sweetheart. ▸ noun:  A name given to female dogs. Similar: lass, jeune fille, young girl, lassy, lassiehood, lessie, Lizzie, wor lass, Lolita, little lady, more... Types: girl, lass, damsel, maiden, wench, chick, babe, dame, more... Phrases: Lassie Come Home, The New Lassie, Lassie Come-Home, Lassie Lou Ahern, Tallahassee Lassie, more... Adjectives: little, poor, wee, young, scotch, puir, dear, scottish, sweet, good, eyed Colors:     green,     blue,     red,     yellow,     brown, more... ▸ Words similar to lassie ▸ Usage examples for lassie ▸ Idioms related to lassie ▸ Wikipedia articles (New!) ▸ Popular adjectives describing lassie ▸ Words that often appear near lassie ▸ Rhymes of lassie ▸ Invented words related to lassie