Semantics is a subfield of linguistics that studies the meaning of words, phrases, sentences, and discourse. It is concerned with how people assign meaning to linguistic expressions and how they use these expressions to communicate with each other.
The study of it involves the analysis of both the structure and the content of language. It seeks to understand how linguistic expressions relate to the world around us, and how they are used to convey information about the world.
There are several different approaches , including formal semantics, cognitive semantics, and lexical semantics.
Formal semantics is a mathematical approach to semantics that seeks to provide a rigorous and precise account of the meaning of linguistic expressions. It is concerned with the logical relations between propositions and the truth conditions of sentences.
Cognitive semantics, on the other hand, is an approach that emphasizes the role of mental processes and conceptual structures in the interpretation of language. It seeks to explain how people use language to represent and communicate their knowledge and experience of the world.
Lexical semantics is concerned with the meaning of individual words or lexemes. It involves examining the different senses of a word, how words are related to each other in terms of meaning (such as synonyms and antonyms), and how the meanings of words can change over time.
Compositional semantics is concerned with how the meanings of words combine to form larger units of meaning, such as phrases, clauses, and sentences. It involves examining the rules and principles that govern how words are combined to create meaning, and how different meanings can be expressed through different sentence structures.
It is also closely related to pragmatics, which is the study of how context affects meaning. Pragmatics looks at the social and cultural factors that influence how language is used, and how speakers and listeners interpret language in different situations.

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