A definition of language

A language is a kind of system of visual, auditory, or situational constraints. A set of agreed-upon symbols is one feature of language, but all languages must also define the structural relationships between these symbols in a system of grammar. Most languages make use of sound, but the combinations of sounds used do not have any inherent meaning - they are merely an unconscious agreed-upon convention to represent a certain thing by users of that language. For example, many languages use different coercions as an agreed convention to represent the sounds a cat makes.