1 not knowing facts or information that you ought to know:
an ignorant and uneducated man
ignorant of
Political historians are often rather ignorant of economics.
ignorant about
Many people remain blissfully ignorant about the dangers of too much sun (=happy because they do not know about the dangers).
see usage note ignore
2 caused by a lack of knowledge and understanding:
an ignorant remark
ignorant opinions
3 British English spoken rude or impolite:
ignorant behaviour
ignorantly adverb

Dictionary results for "ignorant"
Dictionary pictures of the day
Do you know what each of these is called?
What is the word for picture 1? What is the word for picture 2? What is the word for picture 3? What is the word for picture 4?
Click on any of the pictures above to find out what it is called.