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The definition of erratic

4 Definitions of: erratic

    1. adjective, irregular in performance, behaviour, or attitude; inconsistent and unpredictable
    2. adjective, having no fixed or regular course; wandering
    3. noun, a piece of rock that differs in composition, shape, etc, from the rock surrounding it, having been transported from its place of origin, esp by glacial action
    4. noun, an erratic person or thing
    5. Show me some examples of this word: erratic
    6. Show me the etymology of the word: erratic

From Collins