Semantics is the study of meaning in language, focusing on how words, phrases, sentences, and texts convey meaning. It involves the interpretation of linguistic expressions and explores the relationships between signifiers—like words and phrases—and what they refer to or signify in real-world contexts. Semantics plays a critical role in various fields, including linguistics, philosophy, artificial intelligence, and cognitive science, as it helps to understand how language is used to communicate ideas, emotions, and information.