n. describing realistic forms, as opposed to prescribing idealistic norms, of linguistic usage.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. (linguistics) a doctrine supporting or promoting descriptive linguistics
n. (ethics) a doctrine holding that moral statements have a truth value
Word Usage
"The trouble with descriptivism—the idea that the grammarian's job is to describe the language, not to issue judgments about propriety—isn't that it's theoretically unsound."