We found 8 dictionaries that define the word half sisters:

General (7 matching dictionaries)

1. half sisters: Merriam-Webster
2. half-sisters, half-sisters: Collins English Dictionary
3. half sisters: Vocabulary.com
4. half-sister's, half-sisters: Wordnik
5. half-sisters, half sisters: Wiktionary
6. Half-sisters, The Half Sisters: Wikipedia, the Free Encyclopedia
7. Half-sisters: TheFreeDictionary.com

Medicine (1 matching dictionary)

8. Half-sisters, Half sisters: Medical dictionary

(Note: See half_sister as well.)

Definitions from Wiktionary (half sister) ▸ noun:  A female sibling sharing a single parent. ▸ Also see half_sister Phrases: The Half Sisters, more... ▸ Words similar to half sisters ▸ Usage examples for half sisters ▸ Idioms related to half sisters ▸ Wikipedia articles (New!) ▸ Words that often appear near half sisters ▸ Rhymes of half sisters ▸ Invented words related to half sisters