default option

noun
UK /dɪˈfɔːlt ˈɒpʃən/
US /dɪˈfɔlt ˈɑpʃən/

The choice that happens automatically if you do not pick something else.

If you don't choose a seat, the default option is the window seat.


OTHER MEANINGS

2. In computing, the value or action a program uses when the user gives no instruction.

The default option for saving files is the Documents folder.

3. The option that applies when no active choice has been made in a contract or agreement.

Under the plan, the default option is to renew for another year.

4. A choice made by doing nothing, often used in behavioral economics.

Organ donation becomes the default option in some countries.