n. One who smatters; one who dabbles in or experiments with a little bit of everything, especially knowledge.
the GNU version of the Collaborative International Dictionary of English
n. One who has only a slight, superficial knowledge; a sciolist.
The Century Dictionary and Cyclopedia
n. One who smatters, in any sense; one who has only slight or superficial knowledge.
Word Usage
"But the worst of it is that all efforts in this direction have generally ended in producing a "smatterer," whose theories are baffled by constant disappointment, and whose worldly prosperity is lessened by his mistaken experiments."