: not having or including any losses or defeats
They were undefeated in their first nine games. [=they won their first nine games]
an undefeated team/season
Cite this Entry
“Undefeated.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/undefeated. Accessed 21 Jun. 2026.
Copy Citation
