1. A linguistic form that is considered correct according to established rules of grammar and language standards, as opposed to what is actually used in practice
The prescriptive form 'whom' is rarely used in modern English despite being grammatically correct.
A forma prescritiva 'a quem' é raramente usada no português moderno, apesar de ser gramaticalmente correta.
2. In grammar and linguistics, a rule-based approach that dictates how language should be used rather than how it is naturally used
Teaching prescriptive forms helps maintain language standards in formal writing.
Ensinar formas prescritivas ajuda a manter os padrões da língua na escrita formal.