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erratic
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As an adjective, erratic means unsteady, random. As a noun, it means a rock moved from one location to another, usually by a glacier.
Meanings of erratic
7 meaningsadjective
Unsteady, random; prone to unexpected changes; not consistent.
“Henry has been getting erratic scores on his tests: 40% last week, but 98% this week.”
Deviating from normal opinions or actions; eccentric; odd.
“erratic conduct”
Liable to sudden unpredictable change
“erratic behavior”
“fickle weather”
“mercurial twists of temperament”
Similar: fickle, mercurial, quicksilverLikely to perform unpredictably
“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”
Similar: temperamental
noun
geologyA rock moved from one location to another, usually by a glacier.
Anything that has erratic characteristics.
Meanings from Wiktionary (CC BY-SA 4.0) and Open English WordNet (CC BY 4.0).