language

1. A body of words, and set of methods of combining them (called a grammar), understood by a community and used as a form of communication.

   Deaf and mute people communicate using languages like ASL.

2. The ability to communicate using words.

   the gift of language

3. A sublanguage: the slang of a particular community or jargon of a particular specialist field.

   legal language;   the language of chemistry

4. The expression of thought (the communication of meaning) in a specified way; that which communicates something, as language does.

   body language;   the language of the eyes

5. A body of sounds, signs and/or signals by which animals communicate, and by which plants are sometimes also thought to communicate.
6. A computer language; a machine language.
7. Manner of expression.
8. The particular words used in a speech or a passage of text.

   The language he used to talk to me was obscene.

9. Profanity.

verb

To communicate by language; to express in language.

noun

A languet, a flat plate in or below the flue pipe of an organ.