1. To intentionally keep a timeframe free or unscheduled. A noun or pronoun can be used between "leave" and "open." I'm leaving Friday night open in case Paulina wants to get dinner. I left open your birthday in case you wanted to do something special that day.
2. To cause one or oneself to be vulnerable or exposed. A noun or pronoun can be used between "leave" and "open." Sir, that position will leave us open to attack from the north. Don't tell Mom too much about your new boyfriend, unless you want to leave yourself open to a lot of personal questions.
3. To be inclined to hear or ponder something. A reflexive pronoun is used between "leave" and "open." These people are just trying to help you, so please leave yourself open to what they have to say.
leave something open
to leave a date or time unscheduled. I left something open on Friday, just in case we want to leave work early. Please leave an appointment open for Mrs. Wallace next week. She will be calling in to our office for an appointment.
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.
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.