1. put emphasis on something
press/drive home a concern/suggestion/notion
If you 'press home' or 'drive home' a fact or opinion, you are highlighting it and emphasising the point. If you 'press something home', it means what you are saying or communicating is of importance and you want others to pay attention: "If we don't get this delivered on time, we will likely lose this client. I can't press this fact home enough." This expression can be used to convey the seriousness of something you are trying to convey. It can also be used to talk about someone's attitude: "He is always pressing home the issue of safety since the accident last year. I mean we get it already. He doesn't have to keep reminding us." You will hear this in social and professional contexts.