A2
giving a lot of attention to what you are doing so that you do not have an accident, make a mistake, or damage something
Dictionary examples:
The careful student brought a life jacket to swimming class. (0.0)
I'm so careful, I wear a helmet to eat cereal. (0.0)
Be careful with your dreams - they might come true! (0.0)
Be careful with that knife. (9.2)
Michael is a very careful worker. (13.6)
Be careful to look both ways when you cross the road. (25.1)
Be careful what/how much you say to him - he can't keep any secrets! (27.7)
Be careful where you put that hot pan. (28.9)