An effusion; an abundant supply.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (noun) (n.) (noun)
A pouring out: an abundant supply.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (noun) (n.) (noun)
Abundant effusion.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (noun) (n.) (noun)

Usage examples:

The first quick, natural outpouring of affection was followed at once by a reaction on either side; they were afraid to speak; and when Lucien almost involuntarily looked round for another who should have been there, Eve burst into tears, and Lucien did the same, but Mme.
- Eve and David by Honore de Balzac
If man would have, it is the giver he must have; the eternal, the original, the ever- outpouring is alone within his reach; the everlasting creation is his heritage.
- The Seaboard Parish, Complete by George MacDonald
I can glory in the bold and broken outline of a mighty mountain; I can gaze with delighted eyes upon the boundless seas, and know not whether to like it more in all the mighty outpouring of its wrath, when the white waves lift their heads to heaven and break themselves in foam upon the rocky beach, or in the calm beauty of its broad and mirrored surface, in which the bright world of sun and sky are seen full many a fathom deep.
- Charles O'Malley, The Irish Dragoon, Volume 2 (of 2) by Charles Lever