1. (noun)dare, daring a challenge to do something dangerous or foolhardy
"he could never refuse a dare"
2. (noun)boldness, daring, hardiness, hardihood the trait of being willing to undertake things that involve risk or danger
"the proposal required great boldness"; "the plan required great hardiness of heart"
3. (adj)audacious, daring, venturesome, venturous disposed to venture or take risks
"audacious visions of the total conquest of space"; "an audacious interpretation of two Jacobean dramas"; "the most daring of contemporary fiction writers"; "a venturesome investor"; "a venturous spirit"
4. (adj)avant-garde, daring radically new or original
"an avant-garde theater piece"