open on (something)(redirected from opening on)
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open on (something)
To begin with some specific thing. The panel discussion opened on a debate about the proposed tax reform legislation. The film opens on a shot of the hero looking out over the valley at dusk.
open (out) on(to) something
[for a building's doors] to exit toward something. The French doors opened out onto the terrace. The doors opened on a lovely patio.