1. A linguistic form derived from Latin or Greek, typically used in formal, academic, or literary contexts; a word form that reflects its classical etymology rather than popular derivation
The word 'coração' is a popular form, while 'cordial' is a learned form derived from Latin 'cor'
A palavra 'chave' é uma forma popular, enquanto 'clávis' é uma forma culta do latim
2. Standard, formal, or grammatically correct usage as opposed to colloquial speech
In formal writing, one should use the learned form rather than slang
Na redação formal, deve-se usar a forma culta em vez de gíria