Definition: A device that produces a monochromatic, coherent beam of light.

Alright class, settle down and let’s take a look! Today we’re tackling the word "laser," it’s quite a clever name, you see. Let's break it down, nice and slow, So the meaning truly starts to glow. The dictionary tells us, clear and bright, “A device that produces a monochromatic, coherent beam of light.” Now, let’s unpack those words, one by one, you see: Monochromatic: Think of colors, bright and bold, It means the laser shines with just one color told. Like a single ruby red, or sapphire blue, it's true! Coherent: This describes the light’s design, All the waves are traveling in a perfect line! They're synchronized and neat, you understand? Beam of Light: Finally, we see, A focused ray, for all to agree. It travels straight and true, with power anew! So basically, a laser is a clever piece of kit, That sends out light, perfectly fit – Just one color, tightly aligned, A focused beam, brilliantly designed! Do you have any questions about this, class? Don't be shy, let’s discuss!