origin-n; 4 Senses

Sense Number 1: beginning

Commentary: ORIGIN[+event] The inception or the first part of something; the event that begins something. This will probably be the most common sense.

There are a number of theories about the moon's origin.
Some scientists believe that the moon had its origin in a massive asteroid that hit the Earth.
Darwin's "Origin of Species" caused a lot of controversy in its time.
What's your place of origin? (the place where your origin occurred)
This narrative traces the history of the Navajos from their origins to the twenty-first century.
This is a band that continues to grow from its punk origins.

PropBank: origin.01
WordNet 2.0 Sense Numbers: 3

Sense Number 2: place of beginning

Commentary: Refers specifically to the place where something originated.

If you walk upstream long enough, you'll find the river's origin.
Jupiter was the origin of the radiation.
My origin is Sweden, but I've been in the United States for three years.

PropBank: NM
WordNet 2.0 Sense Numbers: 1

Sense Number 3: ancestry

Commentary: The ancestors of a person, or the properties associated with them.

I can trace my origin back to my great-great-great grandfather.
He's a peasant who comes from a noble origin.
Though Shakespeare had humble origins, he still received an education.

PropBank: NM
WordNet 2.0 Sense Numbers: 2 5

Sense Number 4: coordinate point

Commentary: The point of intersection in coordinate axes; the point when all values are zero.

A basic sine curve passes through the origin, I think.
In a two-dimensional graph, the origin is (0,0).

PropBank: NM
WordNet 2.0 Sense Numbers: 4