having the mouth open. gaping, as with surprise or astonishment. greedy, ravenous, or rapacious.

What does it mean when someone opens their mouth?

If someone is looking open-mouthed, they are staring at something with their mouth wide open because it has shocked, frightened, or excited them.

What does open-mouthed wonder mean?

adjective. Gaping in surprise, wonder or astonishment. adjective.