Language (noun)

1. A system of communication used by a particular country or community, consisting of words, grammar, and pronunciation.
2. A particular form of speech, either with respect to a specific country or area or in general.
3. A means of expressing thoughts, feelings, or desires by the use of spoken sounds or conventional symbols.
4. A method of communicating with others.

Origin:

Middle english: via old french from latin lingua "tongue, speech, language".

Examples:

1. She speaks several languages.
2. English is the language of international business.
3. He was born into a family where both languages were spoken.
4. The language of the computer is binary code.
5. The language of flowers has been used for centuries to express feelings.