In linguistics, the grammar of a natural language is its set of structural constraints on speakers 'or writers' composition of clauses, phrases, and words. The term can also refer to the study of such constraints, a field that includes domains such as phonology, morphology, and syntax, often complemented by phonetics, semantics, and pragmatics. There are currently two different approaches to the study of grammar, traditional grammar and theoretical grammar.
An abbreviation (from Latin brevis, meaning short) is a shortened form of a word or phrase by any method. It may consist of letters or words taken from the full version of the word or phrase.