1. in philosophy, anything that can be asserted or denied and that is capable of being either true or false; that is, the content of a typical declarative sentence, such as Grass is green or Lenin was a great man.

2. in linguistics, a formal statement representing the underlying meaning of a sentence or sentence component, irrespective of its form. For example, the sentences I scored the goal and The goal was scored by me represent the same proposition, as would a translation of either sentence into a different language. —propositional adj.