Construction is the process of building something, especially large structures like houses, bridges, roads, or skyscrapers. When you see workers in hard hats operating cranes and cement trucks at a building site, that's construction in action. The word comes from putting materials together piece by piece: laying bricks, pouring concrete, raising steel beams, and connecting all the parts that turn blueprints into real buildings.

Construction requires careful planning. Architects design the structure, engineers calculate how to make it safe and strong, and construction workers do the physical work of assembling everything. A single building might take months or years of construction, with different specialists handling electricity, plumbing, walls, and roofing.

The word also applies beyond buildings. You might talk about the construction of a sentence, meaning how words are arranged to express an idea. In shop class, you might work on the construction of a birdhouse. Scientists study the construction of molecules, examining how atoms connect.

When something is under construction, it means the building process is currently happening. A construction zone is an area where building work is taking place, often marked with orange cones and warning signs. The word emphasizes the active process of creating something substantial and lasting, whether it's a treehouse in your backyard or a suspension bridge spanning a river.