A proposition can have different meanings depending on the context. In philosophy, semantics, logic, and related fields, a proposition is a central concept often characterized as the primary bearer of truth or falsity. It is a statement or an idea that people can consider or discuss whether it is true. In this sense, propositions are related to closed formulae or logical sentences to distinguish them from what is expressed by an open formula. Propositions are "statements" that are truth-bearers. In Aristotelian logic, a proposition is a particular kind of sentence that affirms or denies a predicate of a subject, optionally with the help of a copula. Aristotelian propositions take forms like "All men are mortal" and "Socrates is a man". In modern logic, the term "proposition" is often used for sentences of a formal language. In this usage, propositions are formal syntactic objects that can be studied independently of the meaning they would receive from a semantics.
Outside of philosophy and logic, a proposition can also refer to an offer or suggestion that someone makes to you, usually concerning some work or business that you might be able to do together. It can also refer to a plan, proposal, or scheme.
