master key

1. 1.

   key that secures entrance everywhere

   Synonymspasskeypasse-partoutmaster

   Broaderkey

   Narrowerskeleton key

Questions about master key

What does master key mean?

master key means "key that secures entrance everywhere".

What is another word for master key?

Close synonyms include passkey, passe-partout, master. 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 master key a common word?

master key is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.