Wordnet 3.0
NOUN (2)
1.
(ethics) a doctrine holding that moral statements prescribe appropriate attitudes and behavior;
2.
(linguistics) a doctrine supporting or promoting prescriptive linguistics;
The Collaborative International Dictionary of English v.0.48:
prescriptivism \pre*scrip"tiv*ism\, n.
The doctrine that acceptable grammatical rules should be
prescribed by authority, rather than be determined by common
usage.
[PJC]
WordNet (r) 3.0 (2006):
prescriptivism
n 1: (ethics) a doctrine holding that moral statements prescribe
appropriate attitudes and behavior
2: (linguistics) a doctrine supporting or promoting prescriptive
linguistics