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The definition of irregular

10 Definitions of: irregular

    1. adjective, lacking uniformity or symmetry; uneven in shape, position, arrangement, etc
    2. adjective, not occurring at expected or equal intervals
    3. adjective, differing from the normal or accepted practice or routine
    4. adjective, not according to established standards of behaviour; unconventional
    5. adjective, (of the formation, inflections, or derivations of a word) not following the usual pattern of formation in a language, as English plurals ending other than in -s or -es
    6. adjective, of or relating to guerrillas or volunteers not belonging to regular forces
    7. adjective, (of flowers) having any of their parts, esp petals, differing in size, shape, etc; asymmetric
    8. adjective, (of merchandise) not up to the manufacturer's standards or specifications; flawed; imperfect
    9. noun, a soldier not in a regular army
    10. noun, imperfect or flawed merchandise. Compare second
    11. Show me some examples of this word: irregular
    12. Show me the etymology of the word: irregular

From Collins