under lock and key


Securely locked up, as in He keeps the wine under lock and key. [First half of 1500s]

QUIZZES

BEAT THE DOLDRUMS WITH THIS WORD OF THE DAY QUIZ!

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Question 1 of 7
What does “Indigenous” mean?
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.