Simple Definition:

Technology refers to the application of scientific knowledge [understanding gained through study and experimentation] to create tools, machines, and systems [anything that can be built or used to make work easier]. Examples of technology include electricity, computers, cars, solar panels, water pumps, [machines used to move water from one point to another, for example to get it to your sink], and airplanes.

Very Simple Definition:

Technology means using science to make things that help us in our daily life. Examples include phones, computers, cars, and planes.