Available Definitions:
1) a. - Free from care or anxiety. hence, cheerful; light-hearted.
2) a. - Having no care; not taking ordinary or proper care; negligent; unconcerned; heedless; inattentive; unmindful; regardless.
3) a. - Without thought or purpose; without due care; without attention to rule or system; unstudied; inconsiderate; spontaneous; rash; as, a careless throw; a careless expression.
4) a. - Not receiving care; uncared for.