confirmbutton

noun
UK /kənˈfɜːm bʌtən/
US /kənˈfɜrm bʌtən/

A button you press to say yes or to make something happen.

Press the confirm button to save your game.


OTHER MEANINGS

2. A control in a dialog box that accepts the current settings and closes the box.

Click the confirm button to apply the new settings.

3. A key or on-screen control used to finalize an online purchase.

After checking your cart, tap the confirm button to place the order.

4. A button that verifies a user's identity or action, such as confirming an email address.

Open the email and press the confirm button to verify your account.