Is the word Constitution a common or proper noun?

The word "Constitution" can be both a common noun and a proper noun, depending on how it's used.

Common Noun:

* When referring to the general concept of a set of fundamental principles or established precedents according to which a state or organization is governed.

* Example: "The constitution of the United States is a complex document."

Proper Noun:

* When referring to a specific constitution, such as the Constitution of the United States.

* Example: "The Constitution was written in 1787."

Key to Identifying:

* If the word "Constitution" is used in a general sense, it's a common noun.

* If the word "Constitution" refers to a specific document, especially with a capitalized first letter, it's a proper noun.