Definitions
1.nounThe beginning of something.
2.nounThe source of a river, information, goods, etc.
3.nounThe point at which the axes of a coordinate system intersect.
4.nounThe proximal end of attachment of a muscle to a bone that will not be moved by the action of that muscle.
5.nounAn arbitrary point on Earth's surface, chosen as the zero for a system of coordinates.
6.noun(in the plural) Ancestry.