leave open
1
Keep undecided or unscheduled, as in We don't know how much fabric will be needed; let's leave that open, or The doctor leaves Fridays open for consultation. This expression uses open in the sense of “undetermined,” a usage dating from the mid-1500s.
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2
leave oneself open. Remain vulnerable to; also, remain willing to consider. For example, Her actions left her open to widespread criticism, or I left myself open to further suggestions about how to proceed. Also see under lay open.
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The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.