What does the word "hit" mean in this context?

Native speaker’s answer
Rebecca
"Hit" in this context means to "reach," "become," or "arrive at." It's when you get to, or reach, a certain point. In this case, Naomi got to - or hit - a certain age where she realised that dream or goal wasn't actually possible. Ex: You hit a point in the day where you feel like you can't sit at your desk anymore. Ex: I finally hit my goal of reading three books every month for a year.