niece

The definition of niece is the daughter of your brother or sister, by blood or by marriage.

(noun)

An example of a niece is your brother-in-law's daughter.

See niece in Webster's New World College Dictionary

noun

Origin: ME nece < OFr niece < LL neptia < L neptis, granddaughter, niece, akin to nepos, nephew

See niece in American Heritage Dictionary 4

noun

The daughter of one's brother or sister or of the brother or sister of one's spouse.
The illegitimate daughter of an ecclesiastic who has taken a vow of celibacy.

Origin:

Origin: Middle English nece

Origin: , from Old French

Origin: , from Vulgar Latin *neptia

Origin: , from Latin neptis; see nepōt- in Indo-European roots

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