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1. Completely sure; certain.
2. Too sure; overconfident.

cock′sure′ly adv.
cock′sure′ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cocksureness - total certainty or greater certainty than circumstances warrant
certainty - the state of being certain; "his certainty reassured the others"
References in periodicals archive ?
Butt puts the attacker's cocksureness down to youth but insists there's no point trying to stamp it out of his game.
Barzalona has been assured he will continue to get rides but he may need to rediscover the cocksureness in evidence at Epsom to ensure the camber of his career in Britain stays on an incline.
He'd slaked himself with women and after the first flush of cocksureness, they'd meant nothing.
Unsympathetic readers who hope to find new verbal tokens of such disagreeable and widely alleged Rumsfeldian personality traits as arrogance, abrasiveness, raw egotism, and cocksureness, may be disappointed.
Bora Altas, the 5-year-old Yusuf, exudes none of the annoying cocksureness that often destroys child actors' performances.
It certainly was the cocksureness of infection this monsoon " Marriage took me to Hyderabad.