(adj) liable to sudden unpredictable change, Syn.fickle, quicksilver, mercurial, Example: erratic behavior; fickle weather; mercurial twists of temperament; a quicksilver character, cool and willful at one moment, utterly fragile the next
(adj) likely to perform unpredictably; ; ; - Osbert Lancaster, Syn.temperamental, Example: erratic winds are the bane of a sailor; a temperamental motor; sometimes it would start and sometimes it wouldn't; that beautiful but temperamental instrument the flute
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. [ 1913 Webster ]
2. Deviating from a wise of the common course in opinion or conduct; eccentric; strange; queer; as, erratic conduct. [ 1913 Webster ]
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 ]
n. 1. One who deviates from common and accepted opinions; one who is eccentric or preserve in his intellectual character. [ 1913 Webster ]
2. A rogue. [ Obs. ] Cockeram. [ 1913 Webster ]
3. (Geol.) Any stone or material that has been borne away from its original site by natural agencies; esp., a large block or fragment of rock; a bowlder. [ 1913 Webster ]
☞ In the plural the term is applied especially to the loose gravel and stones on the earth's surface, including what is called drift. [ 1913 Webster ]
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