noun

• A sketch or account of anything in words; a portraiture or representation in language; an enumeration of the essential qualities of a thing or species.
• The act of describing; a delineation by marks or signs.
• A set of characteristics by which someone or something can be recognized.
• (taxonomy) A scientific documentation of a taxon for the purpose of introducing it to science.
• (linguistics) The act or practice of recording and describing actual language usage in a given speech community, as opposed to prescription, i.e. laying down norms of language usage.
• (linguistics) A descriptive linguistic survey.