When someone "crosses your mind," it means that they suddenly come to your thoughts or you find yourself thinking about them without any particular reason or trigger. It might be a fleeting thought or a more prolonged reflection on that person. This can happen in various situations, such as when you see something that reminds you of them, hear their name mentioned, or simply during moments of reflection or daydreaming.
The phrase "crossing your mind" is often used to describe the unexpected and involuntary nature of the thought. It doesn't necessarily imply any specific significance or intention behind the thought, but it might signify that the person holds some level of importance or emotional connection to you. Sometimes, it could be a sign that you miss them or that they have been on your mind for some reason, even if you're not fully aware of the reason behind it.
Overall, it's a common human experience to have thoughts about people we know, whether they are family, friends, romantic partners, or acquaintances, even when they are not present physically. Our minds are continuously processing information and memories, and thoughts about people we have known or care about can spontaneously emerge from time to time.