전쟁이나 경기, 경쟁 등에서 한 번도 패배하지 않은 상태를 의미함
not defeated, especially in a battle or other contest
예문:
"The team remained undefeated throughout the entire season and won the championship."
"She retired as an undefeated champion after a decade of professional boxing."
"Despite the heavy pressure, his will to succeed remained undefeated."