RECKLESS Meaning of RECKLESS in English [reck.less] adj (bef. 12c) 1: marked by lack of proper caution: careless of consequences 2: irresponsible "~ charges" syn see adventurous -- reck.less.ly adv -- reck.less.ness n Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012