sibling

A sibling is your brother or sister. It's that simple.

The word sibling once meant anyone who is related to you, but now it's reserved for children of the same parent or parents. It is a word that was once out of use but then brought back into English in the early 1900s as a useful word in anthropology. If you and your brother fight all of the time, your parents might call it sibling rivalry. You might just call him annoying and run from the room.

Definitions of sibling
1

n a person's brother or sister

Synonyms:
sib
Types:
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half blood
one of siblings who have only one parent in common
quad, quadruplet
one of four children born at the same time from the same pregnancy
quin, quint, quintuplet
one of five children born at the same time from the same pregnancy
triplet
one of three offspring born at the same time from the same pregnancy
twin
either of two offspring born at the same time from the same pregnancy
dizygotic twin, fraternal twin
either of two twins who developed from two separate fertilized eggs
identical twin, monozygotic twin, monozygous twin
either of two twins developed from the same fertilized ovum (having the same genetic material)
Type of:
relation, relative
a person related by blood or marriage

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