- to make an immediate and accurate reckoning of (the number of items in a group or sample) without needing to pause and actually count them: for an average adult, the maximum number of such items is generally observed to be six: No one on our team was able to subitize the sets with eight or more triangles.It seems that some people can subitize more proficiently at certain times of the day.
- to perceive the number of (a group of items) at a glance and without counting
