definition of
span

[1] #1 span v. [cross, traverse, sweep] to cover or extend over an area or time period; "Rivers traverse the valley floor", "The parking lot spans 3 acres"; "The novel spans three centuries". wn

[2] #2 span n. the complete duration of something; "the job was finished in the span of an hour". wn

[3] #3 span n. the distance or interval between two points. wn

[4] #4 span n. [couple, pair, twosome, twain, brace, yoke, couplet, distich, duo, duet, dyad, duad] two items of the same kind. wn

[5] #5 span n. a unit of length based on the width of the expanded human hand (usually taken as 9 inches). wn