1 courageous, brave, plucky, confident, stout-hearted, lion-hearted, daring, enterprising, audacious, fearless, unafraid, intrepid, resolute, dauntless, undaunted, valiant, stout, valorous, stalwart, adventurous, venturesome; reckless, foolhardy, incautious, daredevil, rash:
It would take a bold man to enter the ring with the champion.
2 audacious, presumptuous, forward, immodest, brazen, impudent, temerarious, impertinent, shameless:
It was very bold of you to speak your mind to the boss.
3 pronounced, outstanding, striking, vigorous, clear, strong, vivid, distinct, conspicuous:
He wrote down their demands in a good, bold hand.