What is the original, most earliest meaning of 'Nostrum'?

So the "oldest" meaning—as in, the first meaning of the form nostrum—was "our [thing]", which then led to "of us". The first meaning we can reconstruct for any individual part was nōs, "us".

1. What is the origin of the word nostrum?
2. What is the meaning of nostrum?
3. What is an example of nostrum?
4. What does nostrum mean in politics?

What is the origin of the word nostrum?

From Latin nostrum (“ours”), nominative neuter of noster (“our, ours”).

What is the meaning of nostrum?

: a medicine of secret composition recommended by its preparer but usually without scientific proof of its effectiveness.

What is an example of nostrum?

a medicine sold with false or exaggerated claims and with no demonstrable value; quack medicine. a pet scheme or remedy, especially for social or political ills; panacea: The party was pushing the nostrum of corporate tax reduction, as if that would undo decades of industrial job loss.

What does nostrum mean in politics?

nostrum in American English

2. a scheme, theory, device, etc., esp. one to remedy social or political ills; panacea.