niece Meaning, Definition & Usage

  1. noun a daughter of your brother or sister

WordNet

Niece noun
Etymology
OE. nece, F. nièce, LL. neptia, for L. neptis a granddaughter, niece, akin to nepos. See Nephew.
Definitions
  1. A relative, in general; especially, a descendant, whether male or female; a granddaughter or a grandson. Obs. B. Jonson. Wyclif. Shak.
  2. A daughter of one's brother or sister, or of one's brother-in-law or sister-in-law. primary usage

Webster 1913