It is number whose digits read the same from left to right and from right to left.
For example, 18645254681.
Level is a palindrome meaning equal in position.
reviver
The one-word palindrome that best fits that definition would be peep.
level
Palindrome addition is a mathematical process where you take a number, reverse its digits, and then add the two numbers together. If the resulting sum is not a palindrome (a number that reads the same forwards and backwards), you can repeat the process by reversing the new sum and adding again. This can continue until a palindrome is reached. For example, starting with 87: 87 + 78 = 165, and then 165 + 561 = 726, which is a palindrome.
Level is a palindrome meaning equal in position.
Radar is a palindrome that means "detector."
Otto is a palindrome meaning a name between Oscar and Ovid
Civic is a palindrome meaning something related to government or citizenship
Ewe is a palindrome meaning female sheep.
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peep
reviver
My favourite palindrome has always been was it a cat I saw.
It's from the Greek palindromos, meaning "running back again."
Repaper is the palindrome meaning put up wallpaper again.
Kayak is another word for a small canoe that is also a palindrome.