The Open Dictionary

knife-edge

adjective

UK/ˈnaɪfˌedʒ/
US/ˈnaɪfˌedʒ/

Definitions of knife-edge adjective

sharp

  1. Before noun

    Extremely narrow and having a sharp edge.

    • They had to carefully walk along the knife-edge ridge.

    • The edge of the knife is as sharp as a knife-edge.

    • The mountain path was a knife-edge, with steep cliffs on both sides.

uncertain

  1. Before noun

    Describing a situation or result that is very close and uncertain.

    • The outcome of the match was very knife-edge, with no clear winner.

    • The election results are knife-edge, with the outcome possibly decided at the last minute.

    • The vote on the resolution was knife-edge, with everyone waiting for the final count.