What is Spanning?

Spanning definition and meaning on Dictionary terms:
the distance between the tip of the thumb and the tip of the little finger when the hand is fully extended.
a unit of length corresponding to this distance, commonly taken as 9 inches (23 cm).
a distance, amount, piece, etc., of this length or of some small extent: a span of lace.
Civil Engineering, Architecture. the distance between two supports of a structure.the structure so supported.the distance or space between two supports of a bridge.

the full extent, stretch, or reach of anything: a long span of memory.
Aeronautics. the distance between the wing tips of an airplane.
a limited space of time, as the term or period of living: Our span on earth is short.
Mathematics. the smallest subspace of a vector space that contains a given element or set of elements.

verb (used with object), spanned, span