not hesitating or fearful in the face of actual or possible danger or rebuff; courageous and daring

a bold hero.

not hesitating to break the rules of propriety; forward; impudent

He apologized for being so bold as to speak to the emperor.

necessitating courage and daring; challenging

a bold adventure.

beyond the usual limits of conventional thought or action; imaginative

Einstein was a bold mathematician. a difficult problem needing a bold answer.

striking or conspicuous to the eye; flashy; showy

a bold pattern.

steep; abrupt

a bold promontory.

Nautical . deep enough to be navigable close to the shore

bold waters.

Printing . typeset in boldface.

Obsolete . trusting; assured. ?

make bold

to presume or venture; dare

I made bold to offer my suggestion.

noun

cowardice , fear

noun

courage , recklessness , adventurousness , bravery , daring , dauntlessness , fearlessness , nerve , chutzpah , determination , adventuresomeness , audaciousness , audacity , daredevilry , daredeviltry , daringness , venturesomeness , venturousness , assumption , brashness , brazenness , cheek , cheekiness , discourtesy , disrespect , effrontery , face , familiarity , forwardness , gall , impertinence , impudency , incivility , insolence , nerviness , overconfidence , pertness , presumptuousness , pushiness , rudeness , sassiness , sauciness , assurance , confidence , grit , hardihood , hardiness , impudence , intrepidity , presumption , temerity , valor , vigor