from
The Collaborative International Dictionary of English v.0.48
Erratic \Er*rat"ic\, a. [L. erraticus, fr. errare to wander: cf.
F. erratique. See {Err}.]
1. Having no certain course; roving about without a fixed
destination; wandering; moving; -- hence, applied to the
planets as distinguished from the fixed stars.
[1913 Webster]
The earth and each erratic world. --Blackmore.
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2. Deviating from a wise of the common course in opinion or
conduct; eccentric; strange; queer; as, erratic conduct.
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3. Irregular; changeable. "Erratic fever." --Harvey.
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{Erratic blocks}, {gravel, etc.} (Geol.), masses of stone
which have been transported from their original resting
places by the agency of water, ice, or other causes.
{Erratic phenomena}, the phenomena which relate to
transported materials on the earth's surface.
[1913 Webster]