Semantics is about the relation of words to thoughts, but it also about the relation of words to other human concerns. Semantics is about the relation of words to reality - the way that speakers commit themselves to a shared understanding of the truth, and the way their thoughts are anchored to things and situations in the world.
The Stuff of Thought: Language as a Window into Human Nature (ed. Penguin UK, 2008) - ISBN: 9780141921075