1A challenge or attempt — to take on something difficult or new, to try or dare, sometimes implying defiance.
彼女は世界記録に挑戦することを発表した。
She announced she would attempt to break the world record.
新しい仕事に挑戦するのは怖いが成長の機会でもある。
It's scary to take on a new job, but it's also an opportunity to grow.
その試合は若手選手にとって大きな挑戦だった。
That match was a big challenge for the young player.