The phrase may refer to age, background, arrangement type, meeting pace or simply a willingness to discuss possibilities. Nearby details about availability and intent show which reading is plausible without turning a broad word into an assumption.
Ask about range rather than testing a boundary
A useful question is “Which kinds of connection are you open to?” rather than proposing the most extreme interpretation. One-off versus ongoing, communication pace and relationship situation remain separate points to clarify.
Make your own use of the phrase concrete
If you write it, follow with one example: “open-minded about one-off or occasional meetings” communicates flexibility without asking another person to invent the meaning.
Common questions
Read this quietly.
Does open-minded mean anything goes?+
No. It indicates flexibility, not the absence of preferences or boundaries.
Is it always sexual?+
No. It can describe openness about people, pacing or arrangement formats.
What should I ask?+
Ask which kinds of connection the person is open to and what they already know does not fit.
“Open-minded, mostly free at weekends, see what happens.” The open element might be arrangement length or the sort of person they hope to meet; weekends is the only firm logistical detail.
Wording you can adapt
“Are you open to something occasional and recurring, or are you mainly thinking about a one-off?”
What this clears up
This question offers two ordinary interpretations without assuming a sexual preference. If the answer remains simply “anything,” ask what has worked for them before. Accept a clear limit when one is given.