Beefy means large, strong, and muscular, like someone who lifts weights regularly or works at a physically demanding job. A beefy football player has thick, powerful muscles built for blocking and tackling. A construction worker might have beefy arms from years of heavy lifting.

The word can also describe things that are thick, solid, and substantial. A beefy textbook might weigh down your backpack, while a beefy computer has powerful processors and lots of memory.

When describing objects rather than people, beefy suggests something built to be strong and durable rather than light and delicate. A beefy lock is hard to break. A beefy truck has a powerful engine and solid frame.