span
     n 1: the complete duration of something; "the job was finished in
          the span of an hour"
     2: the distance or interval between two points
     3: two items of the same kind [syn: {couple}, {pair}, {twosome},
         {twain}, {brace}, {yoke}, {couplet}, {distich}, {duo}, {duet},
         {dyad}, {duad}]
     4: a unit of length based on the width of the expanded human
        hand (usually taken as 9 inches)
     5: a structure that allows people or vehicles to cross an
        obstacle such as a river or canal or railway etc. [syn: {bridge}]
     6: the act of sitting or standing astride [syn: {straddle}]
     v : 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" [syn: {cross},
         {traverse}, {sweep}]
     [also: {spanning}, {spanned}]
Source: WordNet® 2.0

spanning
     See {span}
Source: WordNet® 2.0