Invisibly means in a way that cannot be seen. When something happens invisibly, it occurs without anyone being able to watch it happen with their eyes.

Many important things in our world work invisibly. Gravity pulls invisibly on everything around you. The Wi-Fi signals carrying information to your tablet move invisibly through the air. Your body fights off germs invisibly, with white blood cells attacking invaders you'll never see. The wind itself is invisible: you see leaves moving and flags waving, but the air doing the pushing remains unseen.

People sometimes work invisibly too. Stage crew members dressed in black move invisibly during a play, shifting props while the audience focuses on the actors. A good editor improves a story invisibly, making changes that help without drawing attention to themselves.

The word invisibly often describes quiet, unnoticed effort. When your parents fix problems or handle difficulties invisibly, you might not even know the work they did. When a friend supports you invisibly, they help without expecting recognition or thanks. Some of the most valuable work in the world happens invisibly, noticed only when it stops being done.