Make it easy for client to give you the type of feedback you’re looking for. “Today we’re here to discuss the navigation” or “I’d like to confirm we’ve provided an understandable solution for uses cases X and Y”. If the conversation veers towards potential distractions (e.g. proposals for word choice, color schemes, or esoteric edge cases), you can take note of the feedback, but bring the conversation back to the meeting’s stated objectives.
Don’t be defensive. The easiest way to shut down a productive conversation is to ignore feedback and repeat what you’ve already said more vigorously. If the client starts proposing alternate solutions that run counter to yours, rather than just shutting them down and reminding them that “I’m the designer here,” acknowledge that “it sounds like something here isn’t working for you. What are some of the areas where this fell short?” to bring the conversation back to ways to improve the current designs, and to keep you working collaboratively and in your appropriate roles.