Definition
Illegitimate describes something that is not authorized by law or not in accordance with accepted rules and standards. It suggests a lack of validity or authenticity. Think of it as the opposite of something that is legitimate or rightful. For example, an illegitimate government is one that came to power through illegal or unconstitutional means. The term can also refer to a child born out of wedlock, although this usage is becoming less common. Illegitimate actions or claims lack legal or moral standing.