1. (adjective) Having a firm basis in reality and being able to be demonstrated; real and meaningful
We need substantive evidence to support this claim.
Precisamos de evidências substanciais para apoiar essa afirmação.
2. (adjective) Of considerable importance, size, or worth; significant
The company made a substantive investment in new technology.
A empresa fez um investimento substancial em nova tecnologia.
3. (noun) Grammar: a word or phrase functioning as a noun; a noun
In the sentence, 'happiness' is a substantive.
Na frase, 'felicidade' é um substantivo.
4. (adjective) Relating to the essential nature of something; essential
The substantive differences between the two proposals are minimal.
As diferenças substanciais entre as duas propostas são mínimas.