1. [ noun ] a situation in which no progress can be made or no advancement is possible
Synonyms: deadlock standstill dead_end stalemate

"reached an impasse on the negotiations"

Related terms: arrest situation stand_still
2. [ noun ] (transportation) a street with only one way in or out
Synonyms: dead_end cul_de_sac dead-end_street blind_alley
Related terms: thoroughfare
Similar spelling:   impassive