Definition of "Span" :
noun: the act of sitting or standing astride
noun: a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
noun: the distance or interval between two points
noun: a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
noun: two items of the same kind
noun: the complete duration of something
"The job was finished in the span of an hour."
verb: to cover or extend over an area or time period
"The parking lot spans 3 acres."