Impasse
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An impassable road or way; a blind alley; cul-de-sac; fig., aposition or predicament affording no escape.
Impasse meaning & definition 1 of Impasse.
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A point at which no further progress can be made.
Impasse meaning & definition 2 of Impasse.
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a situation in which progress is impossible, especially because the people involved cannot agree:
Impasse meaning & definition 3 of Impasse.