Webster
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Webster’s Revised Unabridged Dictionary · 1913

Erratic

Er·rat′ic (ĕr·răt′ĭk), 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.

The earth and each erratic world. Blackmore.

2. Deviating from a wise of the common course in opinion or conduct; eccentric; strange; queer; as, erratic conduct.

3. Irregular; changeable. "Erratic fever." Harvey.

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.

Er·rat′ic, n. 1. One who deviates from common and accepted opinions; one who is eccentric or preserve in his intellectual character.

2. A rogue. [Obs.] Cockeram.

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.

☞ In the plural the term is applied especially to the loose gravel and stones on the earth's surface, including what is called drift.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty. Of the others, 1,362 (a word or a single letter each) were inferred by AI from the context by the dictionary’s own rules and are marked with a wavy underline (tap or point at one to see the note); the rest, which could not be inferred with confidence, are left as “?”.