1. n. & v.
--n.
1. the full extent from end to end in space or time (the span of a bridge; the whole span of history).
2 each arch or part of a bridge between piers or supports.
3 the maximum lateral extent of an aeroplane, its wing, a bird's wing, etc.
4 a the maximum distance between the tips of the thumb and little finger. b this as a measurement, equal to 9 inches.
5 a short distance or time (our life is but a span).
--v. (spanned, spanning)
1. tr. a (of a bridge, arch, etc.) stretch from side to side of; extend across (the bridge spanned the river). b (of a builder etc.) bridge (a river etc.).
2 tr. extend across (space or a period of time etc.).
3 tr. measure or cover the extent of (a thing) with one's hand with the fingers stretched (spanned a tenth on the piano).
4 intr. US move in distinct stretches like the span-worm.
Phrases and idioms:
span roof a roof with two inclined sides (opp. PENTHOUSE 2, lean-to (see LEAN(1))). span-worm US the caterpillar of the geometer moth.
Etymology: OE span(n) or OF espan 2. n.1 Naut. a rope with both ends fastened to take purchase in a loop.
2 US a matched pair of horses, mules, etc.
3 S.Afr. a team of two or more pairs of oxen.
Etymology: LG & Du. span f. spannen unite 3.
see SPICK AND SPAN. 4.
archaic past of SPIN.