thin

Something "thin" does not have much thickness, width, or fullness. Think of a thin slice of bread compared to a large loaf, or a thin sheet of ice that might crack under your weight. But "thin" is not just about physical size. You can have a thin excuse, meaning one that is not very convincing. Or you might feel your patience wearing thin, which means you are close to losing your temper. Someone might also talk about a "thin alibi," suggesting it is weak and does not give much support.

The context matters: a thin person is slender, a thin soup is watery, and a thin argument is weak. It is a common word for both physical qualities and for ideas, excuses, or feelings that seem weak or not strong enough.

"Thin" is a simple word, but it has several related meanings beyond just not being thick. At its core, it describes something with very little distance from one side to the other, or something that is not full, dense, or heavy. A thin line is narrow. A thin slice of cheese has very little depth. A thin layer of frost on a windshield suggests a light, delicate covering.

However, "thin" goes far beyond physical description. It can also describe something that lacks strength, substance, or richness. A thin voice may sound weak or faint. A thin story or plot may feel simple and not fully developed. We might say someone has "thin skin," meaning they are easily upset by criticism.

The idea of not having much continues in many other uses. A thin crowd at a concert suggests that not many people came. Thin hair does not have much volume. Thin air high in the mountains has less oxygen. A thin profit margin means there is very little room for loss.

Interestingly, "thin" can also be used as a verb. To "thin" something means to make it less dense or less crowded. You might "thin" paint with water, or "thin out" a group of plants so the rest can grow better.

So, whether it describes shape, hair, air, soup, excuses, or patience, "thin" usually points to the same basic idea: not much thickness, fullness, strength, or substance.