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.

adjective

afraid , cowardly , fearful , meek , shy , timid , weak , quiet , reticent , retiring , timorous , faint , fair , light , bashful , coy , diffident , modest

adjective

adventurous , assuming , audacious , aweless , bantam , courageous , daring , dauntless , enterprising , fearless , forward , gallant , heroic , intrepid , resolute , unafraid , undaunted , valiant , valorous , barefaced , brash , brassy , cheeky , coming on strong , confident , fresh , gritty , gutsy , immodest , impudent , insolent , nervy , pert , presumptuous , rude , sassy , saucy , shameless , smart , smart-alecky , spunky , clear , colorful , conspicuous , definite , evident , eye-catching , flashy , forceful , lively , loud , manifest , plain , prominent , pronounced , showy , spirited , strong , vivid , adventuresome , daredevil , venturesome , venturous , doughty , fortitudinous , game , hardy , mettlesome , plucky , stout , stouthearted , assumptive , boldfaced , brazen , contumelious , familiar , impertinent , malapert , overconfident , presuming , pushy , arresting , marked , observable , outstanding , pointed , remarkable , salient , signal , striking , abrupt , precipitous , sheer , acclivitous , arrogant , assured , bardy , big , bodacious , brave , bright , chivalrous , dashing , defiant , fierce , haughty , hoidenish , imprudent , jagged , large , manly , massive , powerful , steep , unabashed , vainglorious , wise