The Collaborative International Dictionary of English v.0.48:

Pleasantry \Pleas"ant*ry\, n.; pl. Pleasantries. [F.
   plaisanterie. See Pleasant.]
   That which denotes or promotes pleasure or good humor;
   cheerfulness; gayety; merriment; especially, an agreeable
   playfulness in conversation; a jocose or humorous remark;
   badinage.
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         The grave abound in pleasantries, the dull in repartees
         and points of wit.                       --Addison.
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         The keen observation and ironical pleasantry of a
         finished man of the world.               --Macaulay.
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