Taking care; giving good heed; watchful; cautious; provident; not indifferent, heedless, or reckless; -- often followed by of, for, or the infinitive; as, careful of money; careful to do right.
exercising caution or showing care or attention; "they were careful when crossing the busy street"; "be careful to keep her shoes clean"; "did very careful research"; "careful art restorers"; "careful of the rights of others"; "careful about one's behavior"