v (transitive) To stretch out, open out (a material etc.) so that it more fully covers a given area of space. (defdate|from 13th c.)
v (transitive) To extend (individual rays, limbs etc.); to stretch out in varying or opposing directions. (defdate|from 13th c.)
v (intransitive) To proliferate; to become more widely present, to be disseminated. (defdate|from 13th c.)
v (transitive) To disseminate; to cause to proliferate, to make (something) widely known or present. (defdate|from 14th c.)
v (transitive) To cover (something) with a thin layer of some substance, as of butter. (defdate|from 16th c.)
n (trading|economics|finance) The difference between the price of a futures month and the price of another month of the same commodity.
n (trading|finance) The purchase of a futures contract of one delivery month against the sale of another futures delivery month of the same commodity.
n (trading|finance) The purchase of one delivery month of one commodity against the sale of that same delivery month of a different commodity.
n (trading) An arbitrage transaction of the same commodity in two markets, executed to take advantage of a profit from price discrepancies.