1. In linguistics and grammar, the absence of an article (definite or indefinite) before a noun, treated as a grammatical element in languages where articles can be omitted.
In the sentence 'Cats are animals,' the word 'cats' has a null article because no 'the' or 'a' precedes it.
Na frase 'Gatos são animais', a palavra 'gatos' tem um artigo nulo porque nenhum 'o' ou 'um' a precede.
2. The zero or empty article in languages like Russian, Chinese, or Polish where articles do not exist or are not obligatory.
Russian uses null articles, so 'dom' can mean 'house,' 'a house,' or 'the house' depending on context.
O russo usa artigos nulos, então 'dom' pode significar 'casa', 'uma casa' ou 'a casa' dependendo do contexto.