Here are some examples of ignorance: The ancient belief that the world was flat was based on an ignorance of scientific facts or observation. When tobacco was first used, people were largely ignorant of the harmful side effects of it. (adjective) An example of ignorant is a person who is has no knowledge of politics. You may find this person's ignorance frustrating. At some point, you will encounter someone who chooses to ignore the facts or refuses to seek them out. ignorant definition: The definition of ignorant is something or someone lacking in knowledge, or is stupid or rude. “Well, that’s ironic.” I’m going to go out on a limb and thank Alanis Morrisette for the misuse of irony. A negative attitude about another race is an example of ignorance. Read on for word lists on task-oriented, relationship-oriented, introverted and extroverted behavior. … Looking for a list of words that describe behavior? How to Stop Letting Ignorant People Bother You.