Heedless of or indifferent to the consequences of one's actions; lacking in prudence or caution; willing or liable to take risks; rash…

Failing to pay due regard; heedless, indifferent, careless. Also with of, †at, †for, †to.

With to: inattentive to, or heedless of, a specified thing. Obsolete.

Not concerned or occupied with something.

Const. of, or with direct object.

Not taking care of or paying attention to something; unnoticing, unheeding. Frequently with of.

In nonstandard or humorous use: regardless.