Something that happens automatically happens in a mechanical way without a person having to do anything extra. If you walk through a door that swings open by itself, it opened automatically.

When something is done automatically, it does it on its own, like a spellchecker that corrects your spelling automatically. In a crash, a car's airbag automatically fills with air. Many computers automatically go into rest mode (to save energy) if you don't touch them for a few seconds. Automatically can also refer to how you do something without thinking about it, like if you automatically walk into your old apartment and startle the new tenants.

Definitions of automatically

adv in a mechanical manner; by a mechanism


adv in a reflex manner

“he answered automatically

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