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general::
Phrase(s): Be careful.
1. an instruction to take care in a particular situation. • Bill: I’m going to the beach tomorrow. Sally: Be careful. Use lots of sunscreen! • Jane: Well, we’re off to the Amazon. Mary: Heavens! Be careful! 2. a way of saying good-bye while cautioning someone to take care. • John: See you around, Fred. Fred: Be careful. • Alice: Well, I’m off. John: Bye, Alice, be careful.
McGrawhill's American Idioms And Phrasal Verbs