fall open

1. 1.

   open involuntarily

   “His mouth dropped open”

   “Her jaw dropped”

   Synonymsdrop open

   Broadersink

Questions about fall open

What does fall open mean?

fall open means "open involuntarily".

What is another word for fall open?

Close synonyms include drop open. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is fall open a common word?

fall open is banded "Uncommon" — turns up in careful writing rather than conversation. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.