Webster 1828 Edition
1.Closeness or denseness of texture or structure; compactness; hardness; solidity; as the firmness of wood, stone, cloth or other substance.
2.Stability; strength; as the firmness of a union, or of a confederacy.
3.Steadfastness; constancy; fixedness; as the firmness of a purpose or resolution; the firmness of a man, or of his courage; firmness of mind or soul.
4.Certainty; soundness; as the firmness of notions or opinions.