| 1. | related by blood; akin. |
| 2. | a kinsman; relative. |
| 3. | one's kin or kindred. |
| 4. | Anthropology. a unilateral descent group. |

sib (sĭb)
n.
A blood relation; a relative.
A person's relatives when considered as a group; kinfolk.
A brother or sister; a sibling.