Plural of crosser; people or things that cross or traverse something, such as pedestrians crossing a street.
From 'cross' (to go across) plus the agent suffix '-er' (one who does the action) plus the plural '-s', creating a noun for entities that perform the action of crossing.
The word 'crossers' is interesting because it can mean border crossers, street crossers, or even creatures that cross a river—the same word works for all these situations because English prioritizes the action (crossing) over what specific thing is being crossed.
Complete word intelligence in one call. Free tier — 50 lookups/day.