Kumi logo
    Kumi

    Learn Japanese. Where understanding folds into fluency.

    Dictionary

    KanjiKanji vocabularyKana vocabularyKanaRadicalsGrammarJLPT N5

    Learn

    GuidesStart where you areWhat is KMT?RoadmapFAQ

    Connect

    EmailDiscordInstagramThreadsTikTokYouTubeLinkedInBlueskyX

    Newsletter

    Start learning free →

    Free forever tier. No card required.

    © 2026 Kumiai Inc. All rights reserved.

    AboutFAQContactStatusPrivacyTermsAttributions
    Dictionary
    1. Dictionary
    2. Kanji Vocab
    3. 未定義の動作

    未定義の動作

    未み定てい義ぎの​動どう作さ

    undefined behavior

    NTNounTechnologyKanji Vocab45 strokes

    みていぎのどうさ

    Noun

    1.
    undefined behavior, unspecified behavior
    computing

    Stroke 0 / 45

    Speed1.0x

    Characters that make up this word

    未
    いま.だ・ま.だ・ひつじ…(2)
    un-・not yet・hitherto・still・even now…(3)
    Kanji
    定
    さだ.める・さだ.まる・さだ.か…(3)
    determine・fix・establish・decide
    Kanji
    義
    righteousness・justice・morality・honor・loyalty…(1)
    Kanji
    動
    うご.く・うご.かす…(2)
    move・motion・change・confusion・shift…(1)
    Kanji
    作
    つく.る・つく.り・-づく.り…(10)
    make・production・prepare・build
    Kanji
    の
    no
    Kana
    Kumi logo

    Track your mastery

    Kumi's KMT system tracks your mastery across kanji, vocabulary, grammar, and reading. Create a free account to use it on 220,000+ concepts.

    Related concepts for this entry

    Used in vocabulary

    • 未
    • 定
    • 義
    • 動
    • 作
    • の

    Explore more

    Kanji Vocab dictionary›Browse all entries›