- Consisting in, or acquired by, immemorial or
long-continued use and enjoyment; as, a prescriptive right of title;
pleading the continuance and authority of long custom.
Meaning of 'prescriptive' (Princeton's WordNet)
1 . prescriptive
[ a]
Meaning (1): - pertaining to giving directives or rules
Example in sentence:
prescriptive grammar is concerned with norms of or rules for correct usage