A lamp is a portable light fixture that plugs into an outlet instead of being wired into the wall or ceiling.
Most people picture a table lamp or a floor lamp. It has a base, a light source, and often a shade to soften or direct the glow. You can move it, swap it, or turn it off without touching a breaker panel.
That portability is what separates a lamp from built in lighting. A ceiling fixture stays put. A lamp can shift from one corner to another as your layout changes.
Technically, the bulb inside is not the lamp. The lamp is the full unit. The base supports it. The shade shapes it. The cord connects it to power.
Lamps are usually used for focused or secondary lighting. A table lamp next to a sofa creates a comfortable reading spot. A pair of lamps on a dresser can balance a wall without needing to install anything permanent.
They are practical and flexible. No mounting bracket. No rewiring. Just plug it in and place it where it makes sense.
Simple, movable light that adapts with the room.