Nonsense is something that makes no sense at all, like a sentence made of random words or an explanation so confused it leaves you more puzzled than before. When your friend claims they can fly by flapping their arms, that's nonsense. When someone insists that two plus two equals seventeen, you're hearing nonsense.

The word describes statements or ideas that are foolish, illogical, or simply untrue. If a classmate tries to convince you that homework improves when you do it upside down while hopping on one foot, you might dismiss this claim as complete nonsense. Teachers sometimes need to separate sense from nonsense when students offer creative excuses for missing assignments.

Nonsense can also mean silly, playful language that breaks normal rules on purpose. Writers like Lewis Carroll and Dr. Seuss created delightful nonsense words like “brillig” and “grinch” that sound real but have no dictionary definition. Nonsense poetry and nonsense songs use made-up words and impossible situations to make us laugh.

When someone says “that's nonsense!” they're usually rejecting a bad idea or false claim. The phrase “no-nonsense” describes someone serious and practical who won't waste time on foolishness. A no-nonsense teacher runs an orderly classroom where students focus on learning rather than goofing around.