activation

Everyday

Activation is making something start working or become active. tree →

In the lessons

Used about cards, accounts, alarms and software («activation code»), and in science (activation of yeast, enzymes, the immune system).

Examples

• The activation code is printed on the back of the card. tree →
• Activation of the alarm takes ten seconds. tree →
• The new phone needs activation before you can use it. tree →
• Heat starts the activation of the yeast. tree →
• The game key worked and activation was quick. tree →
• Activation of the airbag happens in a split second. tree →

Note

Noun from «activate». Mostly uncountable. Formal or technical word.