- The definition of reckless is something that is done foolishly, carelessly, or without thinking about the consequences.
An example of behavior that would be described as reckless driving is driving 110 miles an hour down a highway with a speed limit of 55.
- careless; heedless
- not regarding consequences; headlong and irresponsible; rash
Origin of recklessMiddle English reckeles ; from Old English recceleas: see reck and amp; -less
Origin of recklessMiddle English reckeles, from Old English rēcelēas; see reg- in Indo-European roots.
(comparative recklesser or more reckless, superlative recklessest or most reckless)