nieces' Get Printable Handwriting Hear It! Say It! Write It! Learn It! Spelling Test Definition plural possessive noun. 1 a daughter of your brother or sister; 2 a daughter of your spouse's brother or sister Example Sentence These are my nieces' gifts. Synonyms brother's daughter; sister's daughter; kinswoman Antonyms nephew Hear It! Say It! Write It! nieces' Switch to cursive Start Share with your friends: