1. A statement or idea put forward for consideration or discussion:
* Example: "The company's new marketing proposition is to focus on sustainability."
2. A proposal, offer, or suggestion, especially in business:
* Example: "He received a proposition to join a new company."
3. A logical statement that can be either true or false:
* Example: "The proposition 'All cats are mammals' is true."
4. A formal offer of marriage:
* Example: "He popped the question, and she accepted his proposition."
5. A problem or task to be solved:
* Example: "The mathematician was presented with a challenging proposition."
In short, a proposition is a statement or idea that is being put forward, either for discussion, consideration, or action. The specific meaning depends on the context in which the word is used.