checkbox
/ˈtʃɛkbɒks/noun
A small square on a screen that you click to add or remove a check mark, turning an option on or off.
Example sentences
- “Tick the checkbox if you want to receive our newsletter.”
- “The form won't submit until you check the last checkbox.”
Marking one is 'checking' the box in American English and 'ticking' it in British English.