Examples of “lunatic” in a Sentence

noun A person regarded as insane or wildly irrational (now considered old-fashioned and offensive as a clinical term).

• The old asylum was once, insensitively, referred to as a home for lunatics.
• Only a lunatic would try to cross that motorway on foot.

adj Crazy, reckless, or completely irrational.

• Driving that fast in the fog was a lunatic idea, and we turned back.
• He came up with some lunatic scheme to double his savings overnight.