形容词

1. 无知的;愚昧的;(对…)不知情的
If you describe someone as ignorant, you mean that they do not know things they should know. If someone is ignorant of a fact, they do not know it.

2. 无礼的,粗鲁的(一些人认为用该词表达此义欠妥)
People are sometimes described as ignorant when they do something that is not polite or kind. Some people think that it is not correct to use ignorant with this meaning.

1. uneducated in the fundamentals of a given art or branch of learning
lacking knowledge of a specific field

e.g. she is ignorant of quantum mechanics
he is musically illiterate

Synonym: illiterate

2. uneducated in general
lacking knowledge or sophistication

e.g. an ignorant man
nescient of contemporary literature
an unlearned group incapable of understanding complex issues
exhibiting contempt for his unlettered companions

Synonym: nescientunlearnedunlettered

3. unaware because of a lack of relevant information or knowledge

e.g. he was completely ignorant of the circumstances
an unknowledgeable assistant
his rudeness was unwitting

Synonym: unknowledgeableunknowingunwitting