drop open

1. 1.

   open involuntarily

   “His mouth dropped open”

   “Her jaw dropped”

   Synonymsfall open

   Broadersink

Questions about drop open

What does drop open mean?

drop open means "open involuntarily".

What is another word for drop open?

Close synonyms include fall 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 drop open a common word?

drop 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.