3. (noun)couple, pair, twosome, twain, brace, span, yoke, couplet, distich, duo, duet, dyad, duad two items of the samekind
4. (noun)span a unit of length based on the width of the expanded human hand (usually taken as 9 inches)
5. (noun)bridge, span a structure that allows people or vehicles to cross an obstacle such as a river or canal or railway etc.
6. (verb)straddle, span the act of sitting or standing astride
7. (verb)cross, traverse, span, sweep to cover or extend over an area or timeperiod "Rivers traverse the valley floor", "The parking lot spans 3 acres"; "The novel spans three centuries"
5. (verb)Span the spread or extent of an arch between its abutments, or of a beam, girder, truss, roof, bridge, or the like, between its supports
6. (verb)Span a rope having its ends made fast so that a purchase can be hooked to the bight; also, a rope made fast in the center so that both ends can be used
7. (verb)Span a pair of horses or other animals driven together; usually, such a pair of horses when similar in color, form, and action
8. (verb)Span to measure by the span of the hand with the fingers extended, or with the fingers encompassing the object; as, to span a space or distance; to span a cylinder