Severely means in a harsh, serious, or extreme way. When something affects you severely, it hits hard and causes real problems. A severe winter storm might shut down schools and knock out power, while a mild one just dusts the ground with snow.

The word often describes situations where the intensity really matters. A student who is severely behind in reading needs immediate help, not just a little extra practice. Someone severely injured requires urgent medical care. A judge might punish a serious crime more severely than a minor offense.

You can also use severely to describe strict or harsh treatment. A severe teacher might enforce rules with little patience for mistakes. A parent might speak severely to a child who broke an important rule, using a tone that makes the seriousness clear.

When you see severely, expect something serious: severe consequences, severe weather, or severe criticism all signal that this isn't a gentle situation. The opposite might be mildly or slightly, words that suggest something barely makes an impact.