Simple Definition of unstoppable
: not able to be stopped
Full Definition of unstoppable
: incapable of being stopped <an unstoppable army> <an unstoppable rise to power>
Examples of unstoppable
At this point in the campaign, he appears to be unstoppable.
<at this point she's so far ahead in the polls that she's unstoppable>
First Known Use of unstoppable
Seen and Heard
What made you want to look up unstoppable? Please tell us where you read or heard it (including the quote, if possible).